Malicious PDF — malware analysis report

Static analysis result for SHA-256 251273f97706a185…

MALICIOUS

PDF

65.4 KB Created: 2021-02-27 23:59:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: dcbd911e50c3a77e0011558ff87f4d89 SHA-1: d809946921267f88cc7687417f4ccee1064c05c2 SHA-256: 251273f97706a185b6318c781aea6b048897c25611cb2abc000dacfed5433e4d
124 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting services, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, appears to be a lure related to job descriptions. The presence of embedded URLs suggests an attempt to redirect the user to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 https://gimoguvi.ru/award?keyword=debt+capital+markets+analyst+job+description PDF link annotation
    • https://zogugixuwomu.weebly.com/uploads/1/3/4/2/134234599/zenex.pdfIn PDF document text
    • https://fazugiwe.weebly.com/uploads/1/3/4/0/134012697/8729554.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384030/normal_600c7644e21ff.pdfIn PDF document text
    • http://onlyforyou.space/photosynthesis_lab_gizmo_answer_key_page_3uti66.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447278/normal_5fc7309a82c02.pdfIn PDF document text
    • http://useraisins.pro/metal_gear_solid_v_ground_zeroes_review_ps49slxf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467004/normal_603480e227720.pdfIn PDF document text
    • https://desotidibig.weebly.com/uploads/1/3/0/7/130775813/xopazebu_sagedawanaj.pdfIn PDF document text
    • http://rubyshup.space/91686697574xbwh7.pdfIn PDF document text
    • http://figukamib.22web.org/23444538388.pdfIn PDF document text
    • http://familyit.pro/dodgers_lakers_championships_same_yearkgu7g.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459328/normal_5feb413cd41cd.pdfIn PDF document text
    • http://onlinetiser.website/the_lost_heir_dragon_rider_guidez5xxu.pdfIn PDF document text
    • http://italysummer.space/rizawamozusesizoba4zplt.pdfIn PDF document text
    • https://jevokave.weebly.com/uploads/1/3/4/2/134266272/4850774.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://najubizep.epizy.com/vaxuratugolufune.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/how_to_forward_declare_a_template_class.pdfIn PDF document text
    • http://girinuluzu.rf.gd/comprehension_worksheets_year_5.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE465 5388 bytes
SHA-256: 9380a0f1cb1e5d9aac449c90710c626eb3b7f2039417d4fc53e5a13a5b373da2