Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef6a1b8414464de4…

MALICIOUS

PDF

29.0 KB Created: 2020-05-22 01:48:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 80e2b62cadc1fd0d5b949ce2974c6d95 SHA-1: ba5af0d2dff4bc79254bf50b107512f4c7aab861 SHA-256: ef6a1b8414464de4f412f3b26bffbf2c4679d2cdc0da5e8f1ebe36961ca62e18
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links to other PDF files hosted on various domains. This pattern is indicative of a link farm or SEO manipulation tactic, potentially used to distribute malicious content or improve search engine rankings for malicious sites. The document body itself is heavily obfuscated and contains some of the URLs, further supporting the malicious intent.

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://marengineering.net/uploads/1/3/1/3/131379689/131379689.html#ay%25C5%259Fe+baysal+beslenme PDF link annotation
    • http://theparksphysie.com/uploads/1/3/0/3/130313488/7477120.pdfIn PDF document text
    • http://onephiladelphia2017.com/uploads/1/3/0/5/130588543/pixolajivabelono.pdfIn PDF document text
    • http://victorzhong.xyz/uploads/1/3/0/7/130775388/2552864.pdfIn PDF document text
    • http://samenzelfbouwen.nl/uploads/1/3/1/4/131437502/zuwulupujava-jokovifaza-zujesomid-lobirixewabe.pdfIn PDF document text
    • http://investingprecision.com/uploads/1/3/0/6/130603887/dugalimap.pdfIn PDF document text
    • http://kaizenleadermasterclass.com/uploads/1/3/1/3/131384208/4775701.pdfIn PDF document text
    • http://p4partyproductions.com/uploads/1/3/1/4/131482999/zewuse-ninumoli-matunorokij-solofozuk.pdfIn PDF document text
    • http://brianchonggallery.com/uploads/1/3/0/5/130551654/rodokepakazidawodasa.pdfIn PDF document text
    • http://littlebabyfessler.com/uploads/1/3/1/4/131438079/1205972.pdfIn PDF document text
    • http://tavtrax.com/uploads/1/3/0/5/130590482/5a8e91bbc327ce1.pdfIn PDF document text
    • http://jaajjansoozi.com/uploads/1/3/1/4/131437926/6029217.pdfIn PDF document text
    • http://marplenewtownroofingco.com/uploads/1/3/0/7/130776873/85abc9a31.pdfIn PDF document text
    • http://marecjoyce.lighting/uploads/1/3/0/4/130483067/6179715.pdfIn PDF document text
    • http://friendsoflcas.com/uploads/1/3/0/8/130813992/2ec899c9d67316.pdfIn PDF document text
    • http://joannerickson.com/uploads/1/3/0/6/130639032/podubifeje_serela.pdfIn PDF document text
    • http://yellowsharklogistics.com/uploads/1/3/0/6/130603688/puxarudilafov-tajebuguwu-wiralimafo-fejonike.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 4

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_off00004afe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AFE 9500 bytes
SHA-256: 6ed56068d8809a0cd8f1bf900bfcad578b9824d65bb5ca1d9e02833d8f9bcae4

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