Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6bcd725d35381c5…

MALICIOUS

PDF

85.7 KB Created: 2021-09-01 09:22:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e9f87a8c740e264c6326b0a9caecb24f SHA-1: c859b430a4621be150fc1c036581b19c0c66c0a5 SHA-256: a6bcd725d35381c55108f47a906a5153e82c83bcba9a5f3230c7144f1265c923
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-severity PDF_RANDOM_URL_LINK and ML_NYX_PDF_MALICIOUS. It contains numerous external URIs pointing to compromised CMS uploads and disposable hosting, suggesting it acts as a lure to external malicious sites. The ClamAV detection further supports its malicious nature, likely as a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://catamma.ru/uplcv?utm_term=contract+exam+questions+and+answers PDF link annotation
    • http://evergladesharvesting.com/ckfinder/userfiles/files/xalenaduri.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/08d461eeabcca430c06a5957939882e7/zubogoruzafenubitu.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6ef5f2894---xexitikufokan.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/7mh8ra53sauit61rlrsqo07d95/jifomuvizusufovusipe.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16094344db7a58---50987620739.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0179d3ff1---kinimekok.pdfIn PDF document text
    • https://expobar.vn/app/webroot/files/images/pages/files/mabotikazaxisaxexigizat.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090e73ed3d78---sumini.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160764032e35e4---4150957356.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609188949630c---8873731435.pdfIn PDF document text
    • https://kontiko.com/ktkweb3/images/upload/files/resizoxugekudikakunaloj.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/149c6f4cf8f7a1e1fa4affb13cbdf96a/gejanemugufi.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160af5d89af3ca---badav.pdfIn PDF document text
    • https://bimetoor.com/basefile/bimetoorir/files/zixevovomavuzedejexiv.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/to6ul3gj43iten7qmubta7sen3/23927577254.pdfIn PDF document text
    • https://sitpchemcieszyn.pl/_sitpchem/file/13825050807.pdfIn PDF document text
    • http://retco.ge/ckfinder/userfiles/files/26277489020.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/derefewoxiwajo.pdfIn PDF document text
    • https://acronimocostanzo.com/userfiles/file/mawabujasesolerikameni.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/ddbaa800a2fc9505d1bd71b852084cf3/89876506887.pdfIn PDF document text
    • http://tysons-cafe.com/uploads/files/zalorotinuwafepukivenelez.pdfIn PDF document text
    • http://eclickapps.in/userfiles/files/61956764211.pdfIn PDF document text
    • https://promise-land.com/upload/file/90538090864.pdfIn PDF document text
    • http://schnauzermountainminiatures.com/clients/17729/File/84652888978.pdfIn PDF document text
    • http://tauben-buchmeier.de/kleinberliner-schuetzen/userfiles/files/sitinozujivojaka.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE641 18572 bytes
SHA-256: 49e9681580ef36bdd33a1ef7904a8f04bb4421410db4ab8075d73bed30480f9f
font_01_sfnt_off0001169d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1169D 10952 bytes
SHA-256: 852b3b18bae39ea63c385b6af65b6007b1d03abefc25b0c1ca522ba6810a27ac
font_02_sfnt_off00012fea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.