Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a5da80a4a62275c…

MALICIOUS

PDF

68.3 KB Created: 2021-09-27 21:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 967fa3a620b532b66ea099b6f5ab5b03 SHA-1: 35be127404b75f797a18157d1a185b7b65e133d5 SHA-256: 3a5da80a4a62275c09f218c5bd9267720e5efb5de3c19f97e20d201044686a44
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to link farms or potentially phishing sites, suggesting a lure to external malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the document's structure as a link farm on disposable hosting, reinforcing the phishing or scam nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://medvor.ru/uplcv?utm_term=android+offline+navigation+app PDF link annotation
    • http://email-database.info/userfiles/file/35303860508.pdfIn PDF document text
    • http://sambometal.com/dataroom/file/xilatujutotosinifotax.pdfIn PDF document text
    • https://silky.ae/images/bulk_images/files/fitemurovuxo.pdfIn PDF document text
    • http://thietbikhachsanvinhhung1.com/upload/files/jisafemokotasipapusegife.pdfIn PDF document text
    • http://tamtamphat.com/upload/files/fevufepalubixeferezaputav.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/c38314bc1dbcd85b83875e48c866745c/57783649632.pdfIn PDF document text
    • https://www.bbmnetlicitacoes.com.br/cms/ckfinder/upload/files/kadigejitef.pdfIn PDF document text
    • https://viceda.com/userfiles/file/wewumadojuw.pdfIn PDF document text
    • https://ptkas.com/kingkong/userfiles/files/kijoresu.pdfIn PDF document text
    • http://abhinavabhishad.org/userfiles/file/61115729740.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/161315eaf15de0---badomiramu.pdfIn PDF document text
    • https://bibliotheque-des-arts.ch/ckfinder/userfiles/files/36326751358.pdfIn PDF document text
    • http://1night2daytour.com/ckupload/files/nubujotivatizikadega.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/rivitezakavaziluzuvo.pdfIn PDF document text
    • http://colonia-hausmeister.de/uploads/files/donudivefasemuzozi.pdfIn PDF document text
    • http://ohmamakitchen.com/uploads/files/neganixobodexedunizagiku.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/71100275318.pdfIn PDF document text
    • https://mecaniquekd.ca/upload/file/94928626051.pdfIn PDF document text
    • https://jurad.eu/files/file/gupitalobofukupozalikisot.pdfIn PDF document text
    • https://ezokniga.com/uploads/file/86360002280.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_off0000abb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c3cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3CB 16036 bytes
SHA-256: d41ba3cd6b4e1bc086c8e2f9382428a0b13253c19c5a373649f23edda2e15f99
font_02_sfnt_off0000ebe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE6 10552 bytes
SHA-256: 69ba764231e41e4e5fe086834032d81964223fc41f5a3de136eb1be98330239d

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