Malicious PDF — malware analysis report

Static analysis result for SHA-256 347bf3f36193507c…

MALICIOUS

PDF

41.1 KB Created: 2020-04-29 13:56:56 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 434ea90960c3fe0c2ef9ff2d821408cb SHA-1: 1bdcb04efd9c9cfd91dcf3c09ba3ae89b5d211aa SHA-256: 347bf3f36193507c16a7124342db54825405e6f66a008fc4b2dd57b9f1f182b5
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to domains with numeric or generic slugs, indicative of a link farm or SEO manipulation tactic. The primary heuristic firing, PDF_SEO_LINK_FARM, confirms this behavior. The embedded URLs suggest the document's purpose is to redirect users to these external sites, potentially for phishing or malware distribution.

Heuristics 3

  • 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
  • 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://umzugshelfer-koenig.com/uploads/1/3/0/4/130436074/130436074.html#m+l+a+d+full+form
    • http://autismparental.com/uploads/1/3/0/6/130621938/6802683.pdf
    • http://shabechildcarecenter.com/uploads/1/3/0/6/130639203/2136dac519b987.pdf
    • http://elisajuncosa.com/uploads/1/3/0/4/130489418/rililelid_sefoxuri.pdf
    • http://sipna.website/uploads/1/3/1/0/131070894/8398280.pdf
    • http://bestonlinesurfschool.com/uploads/1/3/0/8/130813307/4964378.pdf
    • http://shalinisairi.com/uploads/1/3/0/7/130739284/5400625.pdf
    • http://barelsdrywall.com/uploads/1/3/0/5/130551512/9978346.pdf
    • http://rhythmknitsyarn.com/uploads/1/3/0/5/130544754/tixejefejet.pdf
    • http://coussinavecmoi.com/uploads/1/3/0/5/130588805/4055280.pdf
    • http://tommystrader.com/uploads/1/3/0/8/130874129/b1a89.pdf
    • http://sipna.website/uploads/1/3/1/0/131070894/
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000642d.bin
d927e948cfa75323a55fbb032a50e65286f3c6a000d81c7f3ab18720efe2245e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x642D 8428 bytes
font_01_sfnt_off00008464.bin
8aa8646ccb736363f3087c90c16db2c208ceba3ef463bd505d6c2cd1febe6923		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8464 16080 bytes

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