Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4553b3f4738ad13…

MALICIOUS

PDF

36.9 KB Created: 2020-06-06 14:15:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 62fb2648589035207c46e1c6a2551801 SHA-1: 72602518c4fb6e21386a47364f992595a0196996 SHA-256: b4553b3f4738ad13e6247e0ccdf54b09bb652faa4e0fca6862cfc66d8d74c1b0
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to SEO-optimized PDF files hosted on various domains. This pattern is indicative of a link farm or traffic redirection scheme. The primary URL, http://masstragerl.com/uploads/1/3/0/3/130379147/130379147.html#panther+tanks+in+action, suggests a lure related to military vehicles. No scripts were extracted, and the document body is heavily obfuscated, limiting further analysis of the exact payload.

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://masstragerl.com/uploads/1/3/0/3/130379147/130379147.html#panther+tanks+in+action PDF link annotation
    • http://hearthandhoundspuppies.com/uploads/1/3/0/5/130588299/0265f5aff56.pdfIn PDF document text
    • http://andrewfreer.com/uploads/1/3/0/6/130621754/zojeradotemekosi.pdfIn PDF document text
    • http://qurxintagurayaha.com/uploads/1/3/1/6/131606416/wufejot.pdfIn PDF document text
    • http://cpanel.willowridge.org/uploads/1/3/1/3/131383981/duxivoz.pdfIn PDF document text
    • http://mastersofrecognition.com/uploads/1/3/0/6/130639675/620ba703918a2.pdfIn PDF document text
    • http://ns4.leafmarks.com/uploads/1/3/0/8/130813504/sagepejoxagedo.pdfIn PDF document text
    • http://floortilehouston.com/uploads/1/3/0/3/130323972/318849.pdfIn PDF document text
    • http://victoriassweettreats.org/uploads/1/3/1/6/131607054/8863603.pdfIn PDF document text
    • http://diamondsandtwine.com/uploads/1/3/0/5/130589070/fe69dc11.pdfIn PDF document text
    • http://masstragerl.com/uploads/1/3/0/3/130379147/terms.htmlIn PDF document text
    • http://masstragerl.com/uploads/1/3/0/3/130379147/dmca.htmlIn PDF document text
    • http://masstragerl.com/uploads/1/3/0/3/130379147/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://jesotafot.files.wordpress.com/2020/06/83803694505.pdfIn PDF document text
    • https://divotuzilora.files.wordpress.com/2020/06/vurewoxerogojogaledonipe.pdfIn PDF document text
    • https://nibujisox.files.wordpress.com/2020/06/wamekatisepuged.pdfIn PDF document text
    • https://suxeniruwip.files.wordpress.com/2020/06/445056449.pdfIn PDF document text
    • https://lofamanu.files.wordpress.com/2020/06/fidumekadil.pdfIn PDF document text
    • https://vinavavavo.files.wordpress.com/2020/06/pizuvewov.pdfIn PDF document text
    • https://rozadivizoti955369783.files.wordpress.com/2020/06/6567177690.pdfIn PDF document text
    • https://jetufaru.files.wordpress.com/2020/06/bigas.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
🗂 Part of campaign: artemiseyewear.com 6 samples

Related samples 1

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_off000065b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65B5 10020 bytes
SHA-256: 916d3b79c779754ed4766ffec932e5314929f2fa4ffea6ed0146a5a26d0088ef

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