Malicious PDF — malware analysis report

Static analysis result for SHA-256 38802f7590fc4eed…

MALICIOUS

PDF

40.5 KB Created: 2020-06-03 22:41:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e999a19a1a29b2dd590659e2b4ce6d63 SHA-1: 6ba6474c5cdd960014882b1fd72818c481821f68 SHA-256: 38802f7590fc4eedd35f5f4c22e89aae93721574d73052d49e989360b541554d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document exhibits characteristics of a link farm, with a high number of external URLs embedded within it. The ML classifier strongly indicates maliciousness. The primary attack pattern involves redirecting users through these numerous links, likely to a malicious payload or phishing site. No scripts were extracted, limiting further analysis of direct execution.

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://sbn.voyagerwebsites.com/uploads/1/3/1/3/131378916/131378916.html#iglesia+de+dios+evangelio+completo
    • http://caffeineandchrist.com/uploads/1/3/0/6/130605338/lagelabeki_jelizovavema_pasimowed.pdf
    • http://shermansmallengines.com/uploads/1/3/0/5/130551639/d616e92c09c49.pdf
    • http://xhailmartinez.com/uploads/1/3/1/6/131637273/tileda.pdf
    • http://gianamorettiproductions.com/uploads/1/3/0/4/130476748/nurubexidexo-sufetirozisuw-tubapirupugi.pdf
    • http://fsb-realestate.com/uploads/1/3/0/2/130272443/fakazanumes.pdf
    • http://d3alder.com/uploads/1/3/0/7/130739593/41494267.pdf
    • http://graysoninnandsuites.com/uploads/1/3/0/6/130604651/5946185.pdf
    • http://host141.carmichaelnl.com/uploads/1/3/0/6/130621100/nudesanadaru-vopiraxupexilu-fubewupi-zivotuxe.pdf
    • http://blankslate.in/uploads/1/3/1/6/131636781/6306379.pdf
    • http://learnreisuccess.com/uploads/1/3/1/4/131453850/0f76878.pdf
    • http://leads100.com/uploads/1/3/0/6/130620930/b390787de96d.pdf
    • http://gettheirname.com/uploads/1/3/0/6/130604848/figugo.pdf
    • http://sbn.voyagerwebsites.com/uploads/1/3/1/3/131378916/terms.html
    • http://sbn.voyagerwebsites.com/uploads/1/3/1/3/131378916/dmca.html
    • http://sbn.voyagerwebsites.com/uploads/1/3/1/3/131378916/policy.html
    • http://xhailmartinez.com/uploads/1/3/1/6/13
    • https://ramokewunema.files.wordpress.com/2020/06/xenujivokupi.pdf
    • https://woginogumeja6990513.files.wordpress.com/2020/06/dukagarugutitozonedusame.pdf
    • https://gupadolajiwu.files.wordpress.com/2020/06/susafunigowarotoz.pdf
    • https://dedokufon.files.wordpress.com/2020/06/tupavok.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_off00007104.bin
068da99680ea7613418cdf8c4be3a5e6dd22742547134f72e7f87655ad730569
pdf-font-stream PDF embedded font (sfnt) at offset 0x7104 11256 bytes