Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a6f849b3574029a…

MALICIOUS

PDF

33.5 KB Created: 2020-05-24 09:58:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fcf58814d293356b0d731afddf97b362 SHA-1: 92d0318c30880f7135f361d55f835706c0a732ed SHA-256: 3a6f849b3574029a1a20e9660e43185167ef98fc94a8b4cfb21c00c3ad5add6e
94 Risk Score

Malware Insights

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

The PDF document was flagged by an ML classifier as malicious. It contains a large number of external links, many of which point to similarly structured URLs on various domains, suggesting a link farm or redirection scheme. The presence of these numerous external links is a strong indicator of a phishing or malware distribution attempt, likely designed to lure users to compromised or malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jagxfitnesscoaching.com/uploads/1/3/0/3/130313228/130313228.html#little+rock+nine+reading+comprehension
    • http://shoekingexclusive.com/uploads/1/3/0/8/130813740/2309774.pdf
    • http://webmail.avianexotichospital.com/uploads/1/3/0/6/130604321/mesatowu_gotogewixavoxu_femetaf.pdf
    • http://tutormom.net/uploads/1/3/0/3/130323666/wizifokutezi.pdf
    • http://quokkawater.com/uploads/1/3/0/2/130272978/9320357.pdf
    • http://ignitebreese.com/uploads/1/3/0/5/130541285/fdc0e.pdf
    • http://scienceofbbq.com/uploads/1/3/0/6/130605104/1422663.pdf
    • http://cedarcreekgypsy.com/uploads/1/3/0/6/130603810/wedok.pdf
    • http://consultoriaprofesional.net/uploads/1/3/0/3/130313178/3718360.pdf
    • http://barromexglobal.com/uploads/1/3/0/6/130604285/tepununenav.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000580c.bin
3ef6d1499a06172f54f75588f6c85c414215be3b3bb0c10a03f3fad87e8ce593		 pdf-font-stream PDF embedded font (sfnt) at offset 0x580C 10296 bytes

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