Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eb0d0f716fcbd62…

MALICIOUS

PDF

67.3 KB Created: 2020-11-14 11:10:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: fc8031a31b3f6a123cb728f87aa9049a SHA-1: 91b79f9b59d9bd65f2a3cf31abc30326053cb492 SHA-256: 2eb0d0f716fcbd623336666db0bb304391605ba1b400a202c2e38f674b748597
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?utm_term=bangla+sangam+mn+bold+free+font In PDF document text
    • https://bivitomelonex.weebly.com/uploads/1/3/4/4/134491730/5099380.pdfIn PDF document text
    • https://joxenawofin.weebly.com/uploads/1/3/4/3/134342561/1a1c87924.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367013/normal_5fa8ac41bb210.pdfIn PDF document text
    • https://ramojiri.weebly.com/uploads/1/3/4/4/134443871/9623390.pdfIn PDF document text
    • https://vajasefa.weebly.com/uploads/1/3/4/4/134490273/nufomop.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/3257372.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/kavud_rejidopaveni_nuxujikalobek_virazuzegivuju.pdfIn PDF document text
    • https://kamanujololide.weebly.com/uploads/1/3/4/6/134628395/877c6.pdfIn PDF document text
    • https://fokakumunimu.weebly.com/uploads/1/3/4/2/134266115/gawuremid-donirepiragifam-vidab.pdfIn PDF document text
    • https://ligexomapaku.weebly.com/uploads/1/3/4/3/134321337/poriziketixejo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380088/normal_5f98dc227749f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/137a6b1d-b264-483b-bf6b-92774382600e/disney_emoji_blitz_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3299b108-a7a1-4e03-b1d0-e3f6d3f78738/how_to_use_crystal_growth_accelerators.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abe2d66a-7f1b-4e7f-b72c-895e07b8ead6/futopibuworopemejol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f30b2457-900b-43ad-b843-3b5f2e86a850/gadireviparodogobomopuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b380486c-3596-4b43-80ae-2a46d5b04e69/paper_mario_bowser_jr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bb1c527-644f-417c-8cfa-29fb14677eab/besetukejevodopemifowone.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b4d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4D3 5416 bytes
SHA-256: 8091b3a26143a40dfee93ed50c5911cec047a4edd12036782590041738c1c4cb
font_01_sfnt_off0000c728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC728 10804 bytes
SHA-256: cf40ded57f0d043f59474873049445df49eac9ef5d3f91d9e997c2fa5bec1cfd
font_02_sfnt_off0000eb51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB51 16084 bytes
SHA-256: ff88491e9b53368aa3a30e8dd34a5b3a2a650623abbadb69eae8d512e7150c33

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