Malicious PDF — malware analysis report

Static analysis result for SHA-256 69ba49c372dd31d0…

MALICIOUS

PDF

74.5 KB Created: 2021-03-21 06:31:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c8da4dc773d4306634ff59b5b923e092 SHA-1: 5902d25c6a6acabf909d58ae23e7e27a67751b0b SHA-256: 69ba49c372dd31d0a97d1d826e95e0d2b6c317340fa44e4c5aa4b60f8955adbf
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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
  • 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://golowaki.ru/wix?keyword=margaritaville+dm1000+cleaning+instructions PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392668/normal_6018e72bb8a46.pdfIn PDF document text
    • https://mesubepivugegej.weebly.com/uploads/1/3/2/6/132682347/4532990.pdfIn PDF document text
    • https://cdn.sqhk.co/pugudanirav/jiQXjhu/23736128209.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374198/normal_5fee67731a417.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460950/normal_60373bec18e7b.pdfIn PDF document text
    • http://fajujefa.getenjoyment.net/temco_gas_fireplace_pilot_light.pdfIn PDF document text
    • https://cdn.sqhk.co/filomada/ihbgdgi/87698458847.pdfIn PDF document text
    • https://cdn.sqhk.co/nuponoviva/jjjghhv/xipenoropejativujuw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369519/normal_5fec7bba3ab5a.pdfIn PDF document text
    • https://cdn.sqhk.co/bozomixega/rQHjgNS/pafataf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475739/normal_601de9d36f96c.pdfIn PDF document text
    • http://pararapameso.getenjoyment.net/radosevutefazefi.pdfIn PDF document text
    • https://sanawovixib.weebly.com/uploads/1/3/4/6/134653903/sogoveki_kesejikojiruw.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/ieih1IR/47183048832.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/f7603c76-c503-4d34-98d8-e74b744bc38d/10586962631.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69693300-a258-49dd-9bf1-368eda26b9d4/25710513418.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f02e8d2f-9725-4830-a9f3-5416d41f06cd/how_to_set_a_universal_remote_to_a_toshiba_tv.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D0 5400 bytes
SHA-256: a05893b4ea9ce37e881513a1f836fa566c993089cf2a2a583eb1fa55ff18bfa2
font_01_sfnt_off0000e925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE925 10588 bytes
SHA-256: 10017d96b17793b725b22f0b44d2668a6814559ceba24b6bddf9b6ac6d6e31dd
font_02_sfnt_off00010cdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDC 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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