Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0ea81207337ac20…

MALICIOUS

PDF

86.7 KB Created: 2021-06-26 03:35:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6cf1625746833843eced04d69b9bc636 SHA-1: 8a8c8a5665709912a3a8ef5d56bf1661239db998 SHA-256: a0ea81207337ac20532a457a2ab8007bb975a43393bf4653a36a410524f13d1f
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded JavaScript and a link farm pointing to compromised websites, indicating it's designed to lead users to malicious content. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests the document's purpose is to trick users into clicking links by posing as a lottery or parcel notification, a common tactic for advance-fee fraud. The embedded JavaScript likely serves to further obfuscate the malicious intent or redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • 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://queure.ru/uplcv?utm_term=24+currency+exchange+near+me
    • https://biocoils.com/img/file/61481283770.pdf
    • http://abogarestudio.com/userfiles/file/rimijinixema.pdf
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/4ec743ea156184e457a80fb742dd85c6/24728890640.pdf
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/g6msa59v568jhn94mfhf1on9sp/28606175241.pdf
    • http://mobilesamara.com/img/files/file/48916803594.pdf
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/ea9d9908effb01a8ec307990dc3360c8/82561768678.pdf
    • https://tangente-mag.com/img/file/28480794558.pdf
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160843f1e0032c---63499651965.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/ecb8tqjdrha3kae449krlvo530/zupebipufo.pdf
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb22da79e4---92552698112.pdf
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a884553ac2a---kavepujetuvugisa.pdf
    • http://lideparts.com/userfiles/file/1621281527.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0ad3b3783---fofulaxuwawatotejiwodud.pdf
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/tikujuf.pdf
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/ct3io8jv3jvbrmr41oiimkjjc1/11610739744.pdf
    • http://docando.es/js/ckfinder/userfiles/files/95222902355.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609dd6afc46d9---jepurefiwesamevipibu.pdf
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1607d66f8d931d---59179140768.pdf
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/8cp4ui46fkpvoqjq1m30a6l4jd/96954155977.pdf
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd6c15dd46---xijofewuwuronezoje.pdf
    • https://thokhoavietnam.com/upload/files/4030753427.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b48ba6d18f---15601034382.pdf
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089537e57ea7---64937279476.pdf
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/8g87r768q02scipsos1m29430f/87025966319.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16071e439e2d3f---89915154250.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee77.bin
826bc23d33a5c39a5f0d88176ca878129c2c7ca7c2f85a7f7accf05e801b1310
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE77 17548 bytes
font_01_sfnt_off00011be0.bin
1d37f84377d174d83e43ed547f934020577bf84be2da7d4574cd2f9c392b72c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE0 10568 bytes
font_02_sfnt_off000133e5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x133E5 16792 bytes