Malicious PDF — malware analysis report

Static analysis result for SHA-256 27ab682c89a6234d…

MALICIOUS

PDF

62.9 KB Created: 2020-11-11 02:44:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5dbaecf36811ba43c1beee511a3b0cea SHA-1: 20f97604641f84e992d189c9acd960777c2cee99 SHA-256: 27ab682c89a6234d2e8c26d886e73f23c37e39b7f2216daae1513d7449da4bf3
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, containing numerous external URLs pointing to potentially malicious content. The ClamAV detection and ML classifier further indicate malicious intent. The document's primary function appears to be redirecting users to external sites, likely for SEO manipulation or to host further malicious payloads.

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://traffset.ru/aws?keyword=unblocked+earn+to+die+2012+hacked PDF link annotation
    • https://morozosewiveloz.weebly.com/uploads/1/3/4/3/134387595/xefudopawutakobokok.pdfIn PDF document text
    • https://guvemixekowarov.weebly.com/uploads/1/3/4/6/134686109/kagivamefuz.pdfIn PDF document text
    • https://vemifibu.weebly.com/uploads/1/3/4/3/134354414/5842008.pdfIn PDF document text
    • https://jewajufigojoxi.weebly.com/uploads/1/3/1/4/131438211/7387201.pdfIn PDF document text
    • https://wubigunes.weebly.com/uploads/1/3/4/5/134507070/a2a1eaf29.pdfIn PDF document text
    • https://zumavekuganupa.weebly.com/uploads/1/3/4/3/134366180/juvavedikidakiwit.pdfIn PDF document text
    • https://losujawidejope.weebly.com/uploads/1/3/4/3/134310111/78763d03cb94a4.pdfIn PDF document text
    • https://piziruzebizopu.weebly.com/uploads/1/3/4/3/134350425/ad517e20f74ba.pdfIn PDF document text
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/1487408.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/putelekireza/of_monsters_and_men_crystals_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/gentle_leader_harness_size_chart.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b8fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8FE 5368 bytes
SHA-256: 891066501b787ebe6524122f4ad905cc667140e7039470e2c9f8b883c6fb3b33
font_01_sfnt_off0000cb43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB43 10476 bytes
SHA-256: 472146be27e543320a3c401c6c538a1fecc8224d2f4bd5983743f8502d236083

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