Malicious PDF — malware analysis report

Static analysis result for SHA-256 92efcd4ed1130e69…

MALICIOUS

PDF

89.8 KB Created: 2021-08-17 10:20:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d189596e8544362a180915a77ea039aa SHA-1: 13fe24b5ddd78af6a5bf5f1071438ea7aefb3f38 SHA-256: 92efcd4ed1130e69ada7e525e0ca9e9b2f45aa711e4616bf1d2bec626fb045bb
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, suggesting an attempt to host malicious payloads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded links are indicative of a downloader or redirector pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 7

  • 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.
  • 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 http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a38e34592ba---gozunefakulopokujigorebu.pdf In PDF document text
    • https://toananhmedical.com/uploads/files/meduwedaxelunijojof.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc23cb9f38e---faxemotobogiravitusaliv.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/jfe7b85pdt2bnn65bg5ii5ull2/maxexudezaxatarul.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/73716761392.pdfIn PDF document text
    • http://gyogytornasziget.hu/uploads/files/bebipuv.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d9132da4b---16481233897.pdfIn PDF document text
    • http://developmentassociationofnagaland.org/nbloom/fckuploads/file/kodomavevibavupemikap.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/9s5bf33uie1h37oimv182a730q/wejipi.pdfIn PDF document text
    • http://csptech.net/admin/userfiles/file/begeletebajuvugudawedun.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160760d76bd16f---bigidujosaw.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160788f6314906---71575450134.pdfIn PDF document text
    • http://hosungtour.com/FileData/ckfinder/files/20210618_0EFB07130991B6B7.pdfIn PDF document text
    • http://imaginove.eu/data/Files/75505848996.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/98199239573.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/s7b5ve7g5jm7tliqjdcce9fjpg/1550765621.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be5d7a0350b---fetena.pdfIn PDF document text
    • http://box8websites.com/ckfinder/userfiles/files/baxuvojax.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/ff38e10093917724767e59dd536b5f43/gejomafaras.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d8006ce48---vudozawamexafisovobavo.pdfIn PDF document text
    • https://tootooair.com/FileData/ckfinder/files/20210625_6F8EAC8ABF378097.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cea9c55ea32---vufuguxu.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/begomefutidegede.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=rafael+orozco+el+idolo+telenovela+capitulo+62+completoPDF link annotation
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EBB 18428 bytes
SHA-256: 90eff883f5263331225913f280b6158448a8e87a46f116de536caf7d7956d07d
font_02_sfnt_off00013df8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DF8 11172 bytes
SHA-256: 85141372808df0bc6fa5b42436b7166e087b2d1abeae8b9e9d923ae14baf34df

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