Malicious PDF — malware analysis report

Static analysis result for SHA-256 08d226d8d96d390a…

MALICIOUS

PDF

38.4 KB Created: 2020-03-25 11:25:44 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 8d26dad2f2cd36b5d7780c41bb91db52 SHA-1: 77eb3908dc0f390a91212658f7fd86d3fee49e33 SHA-256: 08d226d8d96d390ab832712f851362bf6aee06cc89abe7f14e488c8b71ab9d80
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of external links, many of which point to similarly structured URLs, suggesting a link farm or SEO manipulation tactic. The embedded document body text, though partially corrupted, includes a URL that mirrors the structure of other extracted links. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent behind the link distribution.

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://thismaycomeinhandy.com/uploads/1/3/0/6/130620660/130620660.html#resumen+de+el+libro+vendele+ala+mente+no+a+la+gente
    • http://rodrigues-carloshenrique.com/uploads/1/3/0/3/130323566/eab1a6a1e9a06.pdf
    • http://tsuiwahcafe.com/uploads/1/3/0/6/130604422/2e6603bc31.pdf
    • http://mrsbulalangtan.com/uploads/1/3/0/5/130547112/terozamiz.pdf
    • http://interim.at/uploads/1/3/0/6/130604295/2164279.pdf
    • http://thejule.net/uploads/1/3/0/3/130379475/73e32cbed.pdf
    • http://www.thefilmpunks.org/uploads/1/3/0/7/130774990/bibenafifo.pdf
    • http://bodywisdomtulsa.com/uploads/1/3/0/6/130604888/5268273.pdf
    • http://thesaltyurbanite.com/uploads/1/3/0/5/130588625/659034.pdf
    • http://laxambiental.com/uploads/1/3/0/5/130539357/4375191.pdf
    • http://responsivecenters4couples.com/uploads/1/3/0/2/130289237/xewajo.pdf
    • http://vc3hk.bpmtc.com/uploads/1/3/0/5/130589391/331969.pdf
    • http://www.whats-the-risk.com/uploads/1/3/0/7/130775560/fudozijarula.pdf
    • http://helenelizabethart.com/uploads/1/3/0/5/130590499/01b0564d3f678.pdf
    • http://herclosetboutiques.com/uploads/1/3/0/5/130551051/b42061f0.pdf
    • http://www.nimbuswave.org/uploads/1/3/0/7/130775257/7657517.pdf
    • http://gardendream.org/uploads/1/3/0/2/130271030/wukoxu_kagaki_duvirezezavalom.pdf
    • http://www.centurionws.com/uploads/1/3/0/5/130551697/1657283.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_off00006ac0.bin
7c63d3184910869233e9846693306c0997dac553edf4932019aa5801f257abbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC0 8544 bytes

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