Malicious PDF — malware analysis report

Static analysis result for SHA-256 f986d41f8ce59881…

MALICIOUS

PDF

64.0 KB Created: 2021-06-14 12:10:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9a3c275797266be48e6f5c2da9a75999 SHA-1: b090322eb15de4b2707d73937f9b1a13b72313e3 SHA-256: f986d41f8ce5988125aa95deea7c038c22535a97608bd9baac34e2a4d9e58567
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, many pointing to disposable hosting services, suggesting a link farm or phishing campaign. The ClamAV detection and ML classifier indicate malicious intent, likely to redirect users to malicious sites or download further payloads. Although no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to exploit users through deceptive content and external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9080

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • 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://jacksth.ru/123?utm_term=happy+birthday+bhai+status+video PDF link annotation
    • https://suzoniku.weebly.com/uploads/1/3/4/4/134456843/powugojaliremiso.pdfIn PDF document text
    • https://vibusipapomokij.weebly.com/uploads/1/3/2/6/132682711/xaxagurigufaxebunu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483873/normal_60562b0621877.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415081/normal_60634b97b8999.pdfIn PDF document text
    • https://nonovobuzodeku.weebly.com/uploads/1/3/5/3/135348203/672627.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487413/normal_6028e98f5649b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489033/normal_5fec6818df146.pdfIn PDF document text
    • https://lolosovosozo.weebly.com/uploads/1/3/4/8/134882251/votawod.pdfIn PDF document text
    • https://mabajiluvepe.weebly.com/uploads/1/3/1/4/131409333/f9045913fe0.pdfIn PDF document text
    • https://wosubazaroden.weebly.com/uploads/1/3/0/8/130813518/bemipogosivufitig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493602/normal_6043101565bb1.pdfIn PDF document text
    • https://sozatugija.weebly.com/uploads/1/3/4/8/134859818/kelobogadod-wanudu-juxubizax-morem.pdfIn PDF document text
    • https://gevofiku.weebly.com/uploads/1/3/4/7/134759045/febogizug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wixudes.pbworks.com/f/masajozasos.pdfIn PDF document text
    • http://bulafiko.pbworks.com/w/file/fetch/145249809/sbg6580_bridge_mode.pdfIn PDF document text
    • http://zizovitunex.pbworks.com/w/file/fetch/144518637/kosajosuzolinurixelun.pdfIn PDF document text
    • http://lijunew.pbworks.com/w/file/fetch/145025823/48047769413.pdfIn PDF document text
    • http://fodorafirig.pbworks.com/f/28081975546.pdfIn PDF document text
    • http://wigonewakil.pbworks.com/w/file/fetch/145195830/firemabasenazipoxusumozez.pdfIn PDF document text
    • http://togiwuvoze.pbworks.com/f/how_to_fatten_up_a_cow_for_slaughter.pdfIn PDF document text
    • http://gulisapil.pbworks.com/f/85204739045.pdfIn PDF document text
    • http://tujelupirobe.pbworks.com/f/zatuwizagej.pdfIn PDF document text
    • http://milatufed.pbworks.com/w/file/fetch/144776352/99284705040.pdfIn PDF document text
    • http://vogivakazela.pbworks.com/f/nuvabumobi.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED6 5052 bytes
SHA-256: d6b3a000f078d514bb9f3d36d6451fa6cefda94bdf3930949b276d82b81dcfc2

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