Malicious PDF — malware analysis report

Static analysis result for SHA-256 d97a2e59ee402ed3…

MALICIOUS

PDF

67.0 KB Created: 2021-02-17 18:46:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b051c6f935a9166954ea7b1e7a67cda1 SHA-1: 726efaef6e8020c2d16e3673d0c5342186def375 SHA-256: d97a2e59ee402ed309d97c0fd5ac7abda13134280b34415add56e5b82e7760ef
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm for SEO manipulation or phishing. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs, such as 'https://maypoin.ru/wix?keyword=carrier+infinity+control+homeowner%2527s+manual', are likely used to redirect users to malicious sites or download further 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://maypoin.ru/wix?keyword=carrier+infinity+control+homeowner%2527s+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4485165/normal_60052e903e9b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488570/normal_602305105585c.pdfIn PDF document text
    • https://zokolukesowi.weebly.com/uploads/1/3/0/7/130776120/komuboxazenox-namuvefani.pdfIn PDF document text
    • https://cdn.sqhk.co/segevenujuka/aNuBiZn/dilapadisaxuxumesewejo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375071/normal_602cd8fe56a16.pdfIn PDF document text
    • https://cdn.sqhk.co/kupuruvew/6ihEiaE/spaceballs_trailer_english.pdfIn PDF document text
    • https://gefusuteluvis.weebly.com/uploads/1/3/4/5/134595196/domobefowixawe.pdfIn PDF document text
    • https://cdn.sqhk.co/fematixub/hhjNjbg/vovigibarejekuxebal.pdfIn PDF document text
    • https://cdn.sqhk.co/rexixugepir/0oeXF1J/tolelolatiluwoxe.pdfIn PDF document text
    • https://jufesuzukexo.weebly.com/uploads/1/3/5/2/135294717/6233666.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403262/normal_5fd8cad77abe9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501980/normal_5ff21fa8459f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382421/normal_5fd281d862a47.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/lanubili/bhandara_me_nache_binani_song.pdfIn PDF document text
    • http://fobupozomorefiw.epizy.com/91236650134.pdfIn PDF document text
    • http://fapibudu.epizy.com/nafixefapizosilag.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_off0000ca1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA1F 5256 bytes
SHA-256: c4f9923a7f10d4336a0da507c45dcecc641975b3e8db61bf5c66d025be4a8a5f
font_01_sfnt_off0000dbf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF1 10228 bytes
SHA-256: 0e75322f45070f04b75125ae89983ad6bd3c3301ea7317f673d0987eb450f296

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