Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f30fcaae4d0b846…

MALICIOUS

PDF

36.8 KB Created: 2020-04-12 05:13:06 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 19b8e0f9d09a3b0c7d5a6f46045670de SHA-1: 1349a67d1ebc12a10766ddcfb9fc9d4c05ddabdb SHA-256: 6f30fcaae4d0b8460207812656cacc92840f29a5e5e8263a21305736e978f423
96 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to other PDFs with numeric slugs, indicating a link farm or SEO scam. The document body, though heavily obfuscated, contains text related to 'Ridgid shop vac parts' and URLs, suggesting a lure to drive traffic to these sites. The ML classifier also strongly indicated maliciousness.

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://pameladirnberger.com/uploads/1/3/1/3/131398110/131398110.html#ridgid+shop+vac+parts
    • http://factofevolution.org/uploads/1/3/1/4/131484029/8899739.pdf
    • http://neurodiverseatl.org/uploads/1/3/0/6/130604859/duzarodogakez.pdf
    • http://houseofspiritualityhos.com/uploads/1/3/0/5/130551090/9834666.pdf
    • http://derekjbell.com/uploads/1/3/0/5/130588345/jifit-fevivegabesi-nugulobom.pdf
    • http://divinemercy724.com/uploads/1/3/0/6/130622036/1261182.pdf
    • http://thacrax.com/uploads/1/3/0/4/130476607/1335792.pdf
    • http://sarahgordon.net/uploads/1/3/1/3/131398184/5508626.pdf
    • http://14strongnutrition.com/uploads/1/3/0/6/130620438/ca9e6b81d68.pdf
    • http://mynorahaze.com/uploads/1/3/0/7/130740235/gofonizagetu.pdf
    • http://tezshotit.com/uploads/1/3/0/7/130740232/junupovesanu.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_off00006508.bin
4b2fd21c4dacc99db63bf063380fe6f9566ba45449f04dfee38032f5bdc49c45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6508 9104 bytes

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