Malicious PDF — malware analysis report

Static analysis result for SHA-256 276c773332ab66e7…

MALICIOUS

PDF

36.7 KB Created: 2020-05-20 19:05:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 187560d786547aeac38108e5cf66530e SHA-1: e451e22c7aa2e624b91b88da3fe62524fa94d410 SHA-256: 276c773332ab66e73ede939c7f099288cda79d4875513facf47ece260ec8c4e4
94 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, with a heuristic firing indicating a mass of external PDF links. The document body contains numerous URLs pointing to various domains, suggesting a coordinated effort to redirect users. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://cristalcontabilidade.org/uploads/1/3/1/3/131383264/131383264.html#predicacion+expositiva+john+macarthu
    • http://redrobingardening.com/uploads/1/3/0/6/130603930/32ceae8f3b6d615.pdf
    • http://7planesofhealing.com/uploads/1/3/0/4/130483349/5808860.pdf
    • http://debsherkhumanistofficiant.com/uploads/1/3/1/1/131163492/danuvafi_mabisufunopubel_ronavopi_jazokonuputo.pdf
    • http://killencars.com/uploads/1/3/1/6/131606844/nomawoxuzu-fariwuxagamewe.pdf
    • http://charlestonstemfestival.com/uploads/1/3/0/8/130814001/ab3d58798.pdf
    • http://gfmmortgages.com/uploads/1/3/0/7/130776787/9310611.pdf
    • http://mephisthon-shop.org/uploads/1/3/0/7/130740080/losevete_wukivokem_vafebimadoje.pdf
    • http://fleqx.com/uploads/1/3/0/8/130813988/28f350e28.pdf
    • http://lunadconsulting.com/uploads/1/3/0/2/130270783/rilusatu.pdf
    • http://pasaportecitas.net/uploads/1/3/1/3/131384777/7c9d08bf098.pdf
    • http://mycreativeservices.space/uploads/1/3/0/7/130776836/3033756.pdf
    • http://dpcorpservices.com/uploads/1/3/1/4/131453745/8651195.pdf
    • http://mpeach.co/uploads/1/3/0/3/130323175/vifigipufuwuwa.pdf
    • http://andimcmanus.com/uploads/1/3/0/2/130291463/biladu-fenuvumo.pdf
    • http://bourbonsprinkles.com/uploads/1/3/0/5/130543466/zixapi.pdf
    • http://omnichill.org/uploads/1/3/1/4/131454984/disegukema.pdf
    • http://palominofarm.com/uploads/1/3/1/3/131378985/613205.pdf
    • http://tunnland.com/uploads/1/3/0/2/130272240/juwobulus.pdf
    • http://3greenassistance.org/uploads/1/3/0/3/130379475/b22cc34844.pdf
    • http://musicoterapias.com/uploads/1/3/1/3/131380120/rekoguxiga.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_off00006147.bin
f232a872d48ecee2b9cad589803612f6b04bd6f123f6d04f8e9cd52540782777		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6147 11048 bytes

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