Malicious PDF — malware analysis report

Static analysis result for SHA-256 c469cbb5192f64ad…

MALICIOUS

PDF

36.7 KB Created: 2020-06-12 00:13:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 5d7f8bc664787e61b06e5265f526cd1e SHA-1: a82f82908a1d6a5970537824c35f03945e6122eb SHA-256: c469cbb5192f64ad8100dbcffdd28dac69c7606a570a73c91cab6b225945147a
96 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or SEO manipulation tactic. The document body contains text related to 'Washington deer hunting guides' and metadata indicating it was generated by wkhtmltopdf, which could be used to disguise the malicious intent. The primary attack pattern involves directing users to a large collection of external PDFs, potentially to host malicious content or for SEO poisoning.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://hostmaster.decoratorssale.co.uk/uploads/1/3/0/7/130776273/130776273.html#washington+deer+hunting+guides PDF link annotation
    • http://vipsschnauzers.com/uploads/1/3/0/7/130738893/banigilafig-todemiv-jadowapa-bowapakatuxo.pdfIn PDF document text
    • http://greensmithbooks.com/uploads/1/3/0/7/130739810/birasof.pdfIn PDF document text
    • http://flawlesslytanned.com/uploads/1/3/0/4/130489446/dafetekexik-wowaxepesede.pdfIn PDF document text
    • http://zhucesongcaijinwangzhi.br3h.com/uploads/1/3/0/3/130313507/ribuxekipiv_peferuloduw_xalikepi.pdfIn PDF document text
    • http://lorihenderson.com/uploads/1/3/0/5/130547215/zebafuvegoduwex_woxomifigutaru_wasabenu_kexogadikadog.pdfIn PDF document text
    • http://parkerdancecompany.net/uploads/1/3/0/7/130739287/d85d856d83b31a9.pdfIn PDF document text
    • http://sophistable.com/uploads/1/3/1/3/131383646/lifozasaj.pdfIn PDF document text
    • http://celerityrealestate.com/uploads/1/3/1/1/131164246/dukuwomufaleti-xobetasamexe.pdfIn PDF document text
    • http://tcsonline.net/uploads/1/3/0/5/130589100/3101496.pdfIn PDF document text
    • http://ronavian.com/uploads/1/2/9/0/129090826/129090826.html?pixelIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://burizifi.files.wordpress.com/2020/06/58084542533.pdfIn PDF document text
    • https://tudavolo.files.wordpress.com/2020/06/fowemibizusirirotasex.pdfIn PDF document text
    • https://zitipon.files.wordpress.com/2020/06/degajajebebiz.pdfIn PDF document text
    • https://nuredetadu.files.wordpress.com/2020/06/kidasigunoxa.pdfIn PDF document text
    • https://befetoz31370634.files.wordpress.com/2020/06/rurinesinuniviku.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 8

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_off00006247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6247 10820 bytes
SHA-256: 64bc5ea2da2734963d66b0eddef0a9b1f53b5ad59852ed33769ccf1490f4e187

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