Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a46d560e1a8cd0b…

MALICIOUS

PDF

32.6 KB Created: 2020-03-20 15:09:06 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 29f7fcebc8cdb1e0dca1188a3b3b34c3 SHA-1: 8936cd74cc2d236f6b2020df35133189f31a6902 SHA-256: 4a46d560e1a8cd0b0b15229012c293c6dfeebef8cfd069b8ce272cdca5aca9ab
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm. The embedded URLs point to various domains, suggesting a broad distribution effort.

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://sherylpreston.com/uploads/1/3/1/1/131164275/131164275.html#shiloh+baptist+church+trenton+nj+funeral
    • http://colombiahumanrights.org/uploads/1/3/0/6/130621915/5bcc0f1d7.pdf
    • http://forgotmyglasses.net/uploads/1/3/0/5/130543476/viditi.pdf
    • http://dogsandbubbles.com/uploads/1/3/0/7/130775474/sewesanizuku.pdf
    • http://essential-wisdom.com/uploads/1/3/0/8/130814575/2782431.pdf
    • http://www.hittbroadcast.com/uploads/1/3/0/6/130604702/5937d.pdf
    • http://wastedtalentdesign.com/uploads/1/3/0/4/130489604/guzidalo.pdf
    • http://griffinsgoodnews.com/uploads/1/3/0/6/130604177/970701.pdf
    • http://melsolomonphotography.com/uploads/1/3/0/3/130313470/5150044.pdf
    • http://www.conversionconquest.com/uploads/1/3/0/3/130313135/9257e45fce2.pdf
    • http://myzik-xit.site/uploads/1/3/0/6/130605338/8527493.pdf
    • http://aim-mississauga.org/uploads/1/3/0/3/130323932/7f1bf21b6.pdf
    • http://globelend.net/uploads/1/3/0/7/130739383/ferinaretu_xajekukad.pdf
    • http://autodiscover.buildingblocksplaycenter.com/uploads/1/3/0/6/130621501/5611143.pdf
    • http://primeclassutah.com/uploads/1/3/0/5/130544953/zatesotonuzix.pdf
    • http://jlpacupuncture.com/uploads/1/3/0/4/130436299/nojelewugoluk.pdf
    • http://www.lunagardenlearning.com/uploads/1/3/0/8/130874429/2943604.pdf
    • http://blkaceau.com/uploads/1/3/0/6/130621684/sugavojowapalok-wasususuvofade-gabogesitekewu-dedofij.pdf
    • http://medecdesign.com/uploads/1/3/0/3/130323124/bawofufovif_kipase.pdf
    • http://rechtspraak-republieknl-aarde.space/uploads/1/3/0/5/130540507/zalapewute-texede-metunijavub-monumu.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_off0000591f.bin
2f9b0558cc712b597103174f2949b6bcda84e480903104c19b6c9f6d268738f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x591F 7032 bytes

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