Malicious PDF — malware analysis report

Static analysis result for SHA-256 599683932fa685c0…

MALICIOUS

PDF

91.7 KB Created: 2021-06-26 21:33:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 75f0e132f86ea6601d9f60e9df87ccac SHA-1: 203ec66f186cc9d8a1460ec5fc123b9896b32f06 SHA-256: 599683932fa685c05628cec4f8946b21a63fef08f236acc176a39a3566b9161c
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous external URIs pointing to compromised WordPress upload directories, suggesting a tactic to host malicious content or redirect users to phishing sites. The document body is heavily obfuscated and unreadable, providing no direct clues about its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • 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.
  • 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://philabc.ru/uplcv?utm_term=how+to+solve+2+equations+with+3+unknowns PDF link annotation
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160969b0e51e97---punuxulujisuxatexilexopim.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607c40ae3310b---numobegeli.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/amlgnd91096s9iq938rj6pf223/lawasetowunozuribavati.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/0jae05msg3l3qr5smf55rlc7o0/95552141432.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/72821520599.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a874170cd79---poduletom.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/ijjsbq8can1ro3eq3dbd385dk2/24166162928.pdfIn PDF document text
    • http://c-amc.com/upload/files/disebebisazetevesixebukex.pdfIn PDF document text
    • http://futurepoolandspa.com/ckfinder/userfiles/files/wijakaxagugawusad.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/44891e38d3f216f4dfce8a3238d696b4/tovixidotetulowonoxude.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/7f9f65d22c5f65d726e97e200dbb34d9/wunoxejoketuzid.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/7340498173d524f69d6fd24da756be3f/9682469747.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/oas66gki51lmi4iqql3e8c8qpo/sojunemow.pdfIn PDF document text
    • http://bmsorganica.com/userfiles/file/xegisoleretibefigu.pdfIn PDF document text
    • https://vegas-shop.net/uploads/files/25035229341.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc101732e4---zosufirokamebarexopof.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c202f0eeadf---liwamekulamina.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/bc8731bbe98df732812c71a38cfd1993/73826244717.pdfIn PDF document text
    • https://www.indoorclub-informa.com/boletines/img/file/62664816953.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/331c02011b7511681227340c89d412cc/jawosevojufaf.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/dexavojil.pdfIn PDF document text
    • http://ozdoby-betonowe21.pl/Upload/file/55567671272.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9c0a4e168---sijitenipuziv.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011a11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A11 10876 bytes
SHA-256: e3e0a0d81342807d9e7af0d61d7c3def9d0c84b7c1d30a772d757e6cf70244ca
font_02_sfnt_off0001333c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1333C 17576 bytes
SHA-256: da62ecaca78e22f05b41e3b736e31b2452831d3afa00ba31288ed5f84328aadf

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