Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e6d6aa2827c2f1c…

MALICIOUS

PDF

30.1 KB Created: 2020-05-13 06:02:02 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 34364cf60a190f9ae4f3c25d252f7e1b SHA-1: 8e462771b2c5021e920bc0edcc83f8b5f10efc7d SHA-256: 4e6d6aa2827c2f1c2c7facb5a09c6e77f8782073bab08864146bfe2acfdbacfc
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The document body also contains a URL that appears to be a lure. The ML classifier strongly indicates maliciousness. The primary attack pattern involves directing users to a network of websites, likely for SEO spam or to host further malicious content.

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://montanapurewood.com/uploads/1/3/0/5/130539231/130539231.html#criminal+movie++song
    • http://butterflylouise.blog/uploads/1/3/1/1/131164386/4328713.pdf
    • http://thediveapp.com/uploads/1/3/1/4/131484328/5cab2c.pdf
    • http://citoyensdelaterre.ca/uploads/1/3/1/3/131398171/7300456.pdf
    • http://journeycommunications.org/uploads/1/3/1/1/131163744/wimarimalode-pubiwaj.pdf
    • http://mainstcollective.com/uploads/1/3/1/3/131383678/9685066.pdf
    • http://artsywithdapaints.com/uploads/1/3/0/4/130494389/mefebanulu_vajetalafivefim_doruretupezesu_zedodef.pdf
    • http://allancapital.ca/uploads/1/3/1/4/131409508/02eb53bc.pdf
    • http://thebmbonline.com/uploads/1/3/0/7/130738801/risiregowepowur.pdf
    • http://tjrothconstruction.com/uploads/1/3/0/3/130379681/4919695.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_off000049fd.bin
14bd6cf89624f7163a45e87f8bb60394306c2b96c095eed3ed34fce3fda63250		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49FD 10608 bytes

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