Malicious PDF — malware analysis report

Static analysis result for SHA-256 48fe0c3ba0edbc2c…

MALICIOUS

PDF

84.0 KB Created: 2021-09-20 16:08:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 27a1f6a3c48d70ef04ec0b248be83cde SHA-1: 6f0d9aa43bdbfb2ae66ff062f3c06604ebefe07f SHA-256: 48fe0c3ba0edbc2c65d4225c08987ece674528f75c9649804a2b660471bc6b1d
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF contains embedded JavaScript and multiple external URIs pointing to compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of a link farm on disposable hosting and compromised CMS upload storage further supports this, likely serving as a lure to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://medvor.ru/uplcv?utm_term=aesthetic+video+editing+apps+android PDF link annotation
    • https://hrmconsulting.biz/upload/files/maxepaguvinojalaroze.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/16132fc999db30---vuwasixapoj.pdfIn PDF document text
    • http://inoxbienhoa.com/upload/files/lukebukubixowikubitujuxo.pdfIn PDF document text
    • https://eldorado777.ro/upload/editor/file/74124335399.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613030b4ce109---zusuvasug.pdfIn PDF document text
    • http://sithome.com/upfiles/file/20210914011747.pdfIn PDF document text
    • http://andreaslasnik.com/data/files/mugafigugezuvesijewamoda.pdfIn PDF document text
    • http://metrocars.london/survey/userfiles/files/patajovima.pdfIn PDF document text
    • http://appartementslisa.it/an3_Uploads/file/42236433881.pdfIn PDF document text
    • http://www.electricman.in/demo/frontend/web/uploads/files/93054933645.pdfIn PDF document text
    • http://www.saletime.gr/admin/fckfiles/file/76606870362.pdfIn PDF document text
    • http://lamexmarket.com/uploads/files/peveputuzomedi.pdfIn PDF document text
    • https://sma-dfgg.org/site/admin/file/84327741170.pdfIn PDF document text
    • https://pgp-puh.hr/fck_media/file/37545284212.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/nitupevanekewoxomimanif.pdfIn PDF document text
    • http://www.majbrno.cz/uploads/files/23705027379.pdfIn PDF document text
    • http://bukvoznaika.ru/ckfinder/userfiles/files/64315378012.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/takuzekakukaduno.pdfIn PDF document text
    • https://insinkerator.us/images/uploaded/file/lewexikixu.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148522f03048---88633797537.pdfIn PDF document text
    • https://chilegastronomia.cl/uploads/userfiles/files/60451729092.pdfIn PDF document text
    • http://k1a.ru/images/files/file/jomomofedikijudegikujuwa.pdfIn PDF document text
    • http://aluminial.pnh.pt/js/ckfinder/userfiles/files/35375428189.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE99 10792 bytes
SHA-256: a9936183fd81beb4f852e1833af03d6d60221b83675a37734ce6abf7a6859c58
font_01_sfnt_off0000f746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF746 18980 bytes
SHA-256: 987ebe1664964af589d9a6354c2702925a961a580fda2a25c8046d1a037afca4
font_02_sfnt_off00012871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12871 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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