Malicious PDF — malware analysis report

Static analysis result for SHA-256 f971ed73a36411ed…

MALICIOUS

PDF

32.4 KB Created: 2020-06-07 13:40:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: b4fe03d215464c3204e4fce4e69c6b49 SHA-1: b4f8bb70f12a5279ef74ca8898612490b2032217 SHA-256: f971ed73a36411ed1e4c525d514c92239dca935a33ebc11c7c3d53671cd6bef0
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains a large number of external links, many of which point to other PDF files hosted on various domains. The document body and extracted URLs suggest a lure to download TV show episodes, which is a common tactic for distributing malware. The PDF_SEO_LINK_FARM heuristic firing indicates a deliberate attempt to create a link farm, likely for SEO poisoning or to host malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.
  • 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 http://antivirus.ikargb.co.uk/uploads/1/3/0/5/130545278/130545278.html#kurtlar+vadisi+pusu+b%25C3%25B6l%25C3%25BCmleri+indir PDF link annotation
    • http://alexvais.com/uploads/1/3/1/8/131872015/904b1c82f9.pdfIn PDF document text
    • http://lawyerrichardson.com/uploads/1/3/0/4/130489131/vezamop_kodilute_niwawesirasinas_dikolada.pdfIn PDF document text
    • http://mengduqipai.br3h.com/uploads/1/3/0/5/130588649/d98e5320a704d3b.pdfIn PDF document text
    • http://goforwardservices.net/uploads/1/3/1/0/131071256/9209309.pdfIn PDF document text
    • http://tccellars.com/uploads/1/3/0/3/130313376/8734483.pdfIn PDF document text
    • http://riskandcontrolconfidence.com/uploads/1/3/0/7/130776423/9425969.pdfIn PDF document text
    • http://trevorlondgren.com/uploads/1/3/0/6/130621926/7dbcf8d3d688953.pdfIn PDF document text
    • http://totalspeeddevelopment.com/uploads/1/3/0/6/130604748/5331465.pdfIn PDF document text
    • http://breconomics.com/uploads/1/3/0/6/130621831/wafuledunijeguderap.pdfIn PDF document text
    • http://mygotthis.net/uploads/1/3/1/1/131164132/dolopigidu_pibemukabetu_xugegidire_zefakakose.pdfIn PDF document text
    • http://greenmanpros.com/uploads/1/3/1/3/131380977/3615787.pdfIn PDF document text
    • http://crazyfreshstart.com/uploads/1/3/1/3/131383726/xowenifurix-rolitabo-rerozusixa-ritelemawo.pdfIn PDF document text
    • http://scrmedical.com/uploads/1/3/1/4/131454580/pejadadamiwelo-godowamogofovo-puduposi-vevekekazuju.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://babesakaj.files.wordpress.com/2020/06/jamofubovije.pdfIn PDF document text
    • https://daguxazogas.files.wordpress.com/2020/06/retixotitasawom.pdfIn PDF document text
    • https://moxijixo678822952.files.wordpress.com/2020/06/5746842064.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51E5 10840 bytes
SHA-256: 844e93539debf19fb819de4baaa5efa5b5ba4eba05b13f127ec5dd54b8f082b2

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