Malicious PDF — malware analysis report

Static analysis result for SHA-256 892b7173e22daeaa…

MALICIOUS

PDF

38.9 KB Created: 2020-06-11 18:56:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ecfb6c78c283baa066ac5857e94f1bd3 SHA-1: d5dface697c2e152e77ef45d9649e0facfce0781 SHA-256: 892b7173e22daeaa8b668d6246f15d966032f458bae38b614977173a433ecc5e
96 Risk Score

Malware Insights

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

This PDF document was flagged by a machine learning 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 SEO manipulation tactic. The primary purpose appears to be to distribute or link to other malicious content through these numerous external references.

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://carriepolkinsuranceinc.com/uploads/1/3/0/6/130604780/130604780.html#earth+day+lessons+for+preschool
    • http://akeetonbooks.com/uploads/1/3/1/4/131453649/0138387906b70b9.pdf
    • http://eatstreetculinary.org/uploads/1/3/2/3/132302782/4442685.pdf
    • http://yogasanastudio.ca/uploads/1/3/1/1/131163786/2717189.pdf
    • http://power-profiles.com/uploads/1/3/1/6/131636586/3e4fe4.pdf
    • http://korurecruitmentnz.com/uploads/1/3/0/7/130739063/9034497.pdf
    • http://jennydomain3334.net/uploads/1/3/1/8/131856257/5928546.pdf
    • http://sheriahlangevents.com/uploads/1/3/1/3/131379015/117f3f51eaca91.pdf
    • http://family-enterprises-llc.com/uploads/1/3/0/6/130639141/xogagugupek.pdf
    • http://literacycenterofconejovalley.org/uploads/1/3/0/7/130739779/minadujagugidi.pdf
    • http://jamesgilley.co/uploads/1/3/0/6/130621524/rokelafobuwupeli.pdf
    • http://cpcontacts.eastcommltd.com/uploads/1/3/1/3/131381546/wuvesokamezo-jajilibedogon-dejidavuv.pdf
    • http://racingairproducts.com/uploads/1/3/0/6/130620544/9006919.pdf
    • https://fafabozum.files.wordpress.com/2020/06/23411634872.pdf
    • https://woginogumeja6990513.files.wordpress.com/2020/06/dukagarugutitozonedusame.pdf
    • https://veloxagudop.files.wordpress.com/2020/06/mosabi.pdf
    • https://sulajuxije.files.wordpress.com/2020/06/sixej.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_off00006dd1.bin
e576e3e0312da81e5c22ecfd45e10b1669f7b4fb6a60b32e219ac2bbf3de0a6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD1 10100 bytes

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