Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dbcd216c04826af…

MALICIOUS

PDF

47.7 KB Created: 2020-05-21 05:23:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1910dc54a76cdba0b69f21d1bb1896be SHA-1: 2bda4f2b455513f0911ba9ba762971ba42243a3f SHA-256: 1dbcd216c04826af50bf2e1ff0d80992942ac94bb8e08ec26eb4127a0257c782
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs point to various domains, likely serving as landing pages or further redirection points for malicious activity.

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://sallybstudio.com/uploads/1/3/0/5/130590613/130590613.html#actron+cp7677+auto+troubleshooter+manual
    • http://wildflowerwritings.net/uploads/1/3/0/4/130483459/9704750.pdf
    • http://beeftera.com/uploads/1/3/1/4/131408183/5610785.pdf
    • http://intuitivebodyrolling.com/uploads/1/3/0/7/130740489/xazudimof.pdf
    • http://electricstagehome.com/uploads/1/3/1/4/131483083/8518159.pdf
    • http://mannyexclusive.com/uploads/1/3/0/2/130291575/8884040.pdf
    • http://lucascoffey.me/uploads/1/3/0/2/130270898/308defe471bf0f.pdf
    • http://rishi-holdings.com/uploads/1/3/0/2/130289760/jegetodigut-fuvotaxab.pdf
    • http://prescriptionfornutrition.com/uploads/1/3/1/8/131856054/d2a990b7b2300.pdf
    • http://trucredit.biz/uploads/1/3/0/3/130379162/1079394.pdf
    • http://lucymasportsmassage.com/uploads/1/3/0/6/130621305/ac1078ba5.pdf
    • http://dippedbytoria.com/uploads/1/3/0/8/130873820/f25c61be47c.pdf
    • http://angrybassfishing.com/uploads/1/3/0/7/130775346/7274577.pdf
    • http://sarungdenim.com/uploads/1/3/0/6/130621134/jilugiwavojudaxiwapa.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_off00008d74.bin
caba3e791c5141a9f76c4a640fcc274904393038107ada7a9354b9b27994cab4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D74 10964 bytes

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