Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba3e31f29bdf8764…

MALICIOUS

PDF

82.4 KB Created: 2021-07-13 18:35:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: adce741304d4d775c43040435a839c98 SHA-1: 4e98c54d9e954e71a1299c383ac6f771fe2a0908 SHA-256: ba3e31f29bdf8764a0948fda139206be3fee3cf0f7abf4b6430edf66f1902749
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites, suggesting an attempt to host malicious content or redirect users. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to trick users into calling a fraudulent phone number, a common tactic in tech-support scams and callback phishing. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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.
  • 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://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/d37d2c95bcdfefcd2e4ce758b87c7403/bujibefomufi.pdf In PDF document text
    • http://lowndes85.com/clients/d/d3/d39312ffd46aa2fbcc4e4de04d96a17f/File/totanadujovusuluwazorob.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/debidimefomivopasamevux.pdfIn PDF document text
    • https://moto-trend.cz/public/files/fck/file/38472003077.pdfIn PDF document text
    • http://ithaca1966.com/clients/8/85/85e9e0a76fddb83d7689cebc6ab07fae/File/6202072309.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/4788610478.pdfIn PDF document text
    • https://pearproperties.in/userfiles/file/luduxuzajugog.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb5649d135---tejajizar.pdfIn PDF document text
    • http://www.dean-cpa.com/files/adminpic/file/rojujisaparep.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2b2312eee---damofubufemajafakova.pdfIn PDF document text
    • http://cosmic-kino.ru/sadm_files/89147122093.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/57695095733.pdfIn PDF document text
    • https://fedico.ca/upload/editor/file/64831955429.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/4k03q7b190jk5d6igqotpfms32/lolesupomixamufej.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c14848fd17---83728331985.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c59735d4160---sedejevilodaj.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609613f0a9793---lorazefin.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/ggc2ocofthcjlbdomgfub5n66a/69787426075.pdfIn PDF document text
    • https://peterdegendt.be/file/93115812819.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/9fed57520c9a98a04412e675a459e4d4/fukugelaral.pdfIn PDF document text
    • http://eldmsh1.ru/js/ckfinder/userfiles/files/74703163760.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d6e59eeb8---89446804385.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=sketch+of+glass+of+waterPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF76 16344 bytes
SHA-256: 5cd8a120e106fc2d4fc1855603a636a3ce922decfb1b4d98f17a4a5450337c58
font_01_sfnt_off0000d570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD570 10672 bytes
SHA-256: ae667e1c110d0109e2e86bc9b80ff11f23d93ff7ce2966b66f9a5f5481bead6e
font_02_sfnt_off0000ee2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2F 16992 bytes
SHA-256: 5a5c48538c78e716be50e56dbb495c04e053b40c4d95a185efb051bf41c6f9df
font_03_sfnt_off00011a27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A27 1668 bytes
SHA-256: a8dfa31e81e4ab78067ce0ad476c2f72bf5fd96703f8402eee7ee380474c249b
font_04_sfnt_off0001221c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1221C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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