Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fced95e9e8b870b…

MALICIOUS

PDF

36.0 KB Created: 2020-05-24 01:04:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 08e8e815c556bc24d73f46c1414cb0c0 SHA-1: 95e233d6d8a788616fdac8fee2cc75647e69a636 SHA-256: 1fced95e9e8b870b9229110f638f8622cfd039020f188e41682375cbcbbf9362
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files hosted on different domains. The ML classifier also strongly indicated maliciousness. The embedded document body text, though partially corrupted, contains references to URLs that are also present in the list of extracted URLs, suggesting a coordinated effort to direct users to external content. The primary attack pattern appears to be SEO spam or a link farm designed to distribute malicious content or drive traffic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://sta-66-99-58-212.ladse.org/uploads/1/3/0/8/130873852/130873852.html#the+mousetrap+agatha+christie+characters PDF link annotation
    • http://barleysbeans.com/uploads/1/3/0/7/130739811/jusuboxerusuxi.pdfIn PDF document text
    • http://lambsontherapy.com/uploads/1/3/0/7/130775465/zupuresubami.pdfIn PDF document text
    • http://proyectoalabanza.org/uploads/1/3/1/4/131453194/motasugex.pdfIn PDF document text
    • http://karizmalingerie.net/uploads/1/3/0/5/130588205/direregarubijo.pdfIn PDF document text
    • http://jacorinth.com/uploads/1/3/0/7/130739978/jekibiri.pdfIn PDF document text
    • http://xn--ihrlandschaftsgrtner-pzb.de/uploads/1/3/1/4/131453374/7223889.pdfIn PDF document text
    • http://saporirumeni.com/uploads/1/3/0/5/130588710/viruroje_konusenowon.pdfIn PDF document text
    • http://ktencreations.com/uploads/1/3/0/5/130589338/2865910.pdfIn PDF document text
    • http://traderight-bermuda.com/uploads/1/3/1/6/131606087/ribesalusar_wokulawavid.pdfIn PDF document text
    • http://cpanel.q-four.com/uploads/1/3/0/5/130588773/zamuxawizerigaw.pdfIn PDF document text
    • http://supertourist.net/uploads/1/3/0/6/130604752/8390618.pdfIn PDF document text
    • http://mountaincreekcapital.com/uploads/1/3/1/3/131384071/f0e2bf2ba7d3b.pdfIn PDF document text
    • http://yotainme.com/uploads/1/3/0/8/130874606/2032233.pdfIn PDF document text
    • http://parislineone.com/uploads/1/3/0/2/130291433/c88840da3b3fb.pdfIn PDF document text
    • http://brownbutternola.com/uploads/1/3/0/5/130589427/8712529.pdfIn PDF document text
    • http://casserolegreenville.com/uploads/1/3/1/0/131069812/rorewib.pdfIn PDF document text
    • http://swamptraps.com/uploads/1/3/1/4/131407068/tufopasid-vimorikuziji.pdfIn PDF document text
    • http://ustraveldocuments.org/uploads/1/3/0/7/130774978/3785affcb33.pdfIn PDF document text
    • http://trojanhorseboxingclub.com/uploads/1/3/0/6/130604935/bikafofimapez-dakirorif.pdfIn PDF document text
    • http://curatingempathy.com/uploads/1/3/0/4/130483307/81a28f2d.pdfIn PDF document text
    • http://americasmosthauntedneighborhood.com/uploads/1/3/1/4/131438835/dikotimurog-dijutexosol-zuwozorawaxod-wofixo.pdfIn PDF document text
    • http://escape2you.com/uploads/1/3/0/2/130289476/afa75cf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00006499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6499 9296 bytes
SHA-256: 8ab5e7ef37cf144bacfbab49b4090ee60747b234f129a78695690b0aab805b70

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