Malicious PDF — malware analysis report

Static analysis result for SHA-256 c389e92863456e42…

MALICIOUS

PDF

82.0 KB Created: 2021-09-12 08:38:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 94ab249f3870b7253ab2924bfc777782 SHA-1: 4a64b688f16612629ba3c57fe71b3ac9bd96e7f6 SHA-256: c389e92863456e42c0b55bb978567573d37aef13dde5276cf99259efb5645a9b
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to a variety of domains, many of which appear to be compromised or disposable. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to artificially inflate search engine rankings or distribute malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://cructi.ru/uplcv?utm_term=game+dls+2018 PDF link annotation
    • http://xn--tnqz8hz5cb8l.com/upload/files/mesapafuravikinesepedifog.pdfIn PDF document text
    • https://greenlakepaint.com/ckfinder/userfiles/files/kozigetekagejafa.pdfIn PDF document text
    • http://xn--80aer5aza.xn----htbdepbihnfb8cyg.xn--p1ai/ckfinder/userfiles/files/4695855740.pdfIn PDF document text
    • http://zussobrance.sk/grafika/dokumenty/kafekekituxegen.pdfIn PDF document text
    • https://clubslotalmatriche.com/calcas/file/sulaf.pdfIn PDF document text
    • https://aildf.in/userfiles/file/66774181100.pdfIn PDF document text
    • https://nangluongvada.com/uploads/files/52796142397.pdfIn PDF document text
    • http://artvideo74.ru/upfiles/files/gawuwemuzelovadenakexuse.pdfIn PDF document text
    • https://izr.fr/files/50911488906.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132a66f54ca4---49583491096.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613949839227f---39915317686.pdfIn PDF document text
    • http://aczelzalog.hu/tmp/60549471188.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/kewokafurevoxemanati.pdfIn PDF document text
    • https://tele-video.ru/upload/files/31382710021.pdfIn PDF document text
    • https://ustunbilgisayar.com/userfiles/files/soravuroxumadiw.pdfIn PDF document text
    • http://www.oomedia.com.tw/ckfinder/userfiles/files/detere.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/1b68257ebd3ea7568907d99d57f54456/dupubawumatanifoxotifokeb.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee0002d9ca---pigopifikufulewajelemu.pdfIn PDF document text
    • http://pro-roubenky.cz/UserFiles/File/vufotafudodu.pdfIn PDF document text
    • http://itcbeautytrainingschool.com/userfiles/file/58106279252.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/c6dda217bf213cc0a741beebd40aa233/rinibarot.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16136b41e7cdcb---23718779694.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/46235832214.pdfIn PDF document text
    • http://sinocelltech.com/filespath/files/20210903052432.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_off0000dbd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E4 18052 bytes
SHA-256: c59352dbedae516cd3fe3383eab79adc0f72b7847822e845fc3cc88fd2ef54d5
font_02_sfnt_off000122ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122AC 10436 bytes
SHA-256: ea7ac143d25d48ff25f6b918794bbc980c983b3c00b924873cfe378ad1bee1e5

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