Malicious PDF — malware analysis report

Static analysis result for SHA-256 2590a1d5211332a2…

MALICIOUS

PDF

69.0 KB Created: 2021-04-06 13:28:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d1d7078933e1038b5c25b57b80897bc SHA-1: 9a1a5466451fadd254ecc2ad3bb72cad30c2f310 SHA-256: 2590a1d5211332a2b14da180ce84f64efc24811c0f41613ed13323c4bec9956f
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or SEO spam. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs suggests the document is intended to redirect users to malicious websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://lozipotod.ru/wix?keyword=red+jasmine+summerville+sc
    • https://nanuleseja.weebly.com/uploads/1/3/4/0/134012971/duvosijibejidopoma.pdf
    • https://static.s123-cdn-static.com/uploads/4366374/normal_5ff90c2fb71a8.pdf
    • https://bopojebokup.weebly.com/uploads/1/3/1/4/131408204/farifarumixomu.pdf
    • https://vosaxivuminol.weebly.com/uploads/1/3/4/3/134387598/revowa.pdf
    • https://pebizenif.weebly.com/uploads/1/3/0/8/130874023/16a0d335096.pdf
    • https://cdn-cms.f-static.net/uploads/4407983/normal_6028f009aeac5.pdf
    • https://cdn-cms.f-static.net/uploads/4459628/normal_60225cb8f1553.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rimejiguvif/39031237931.pdf
    • https://s3.amazonaws.com/lanaladu/12377975968.pdf
    • https://fe2b84af-b373-48e0-a714-f820169e3fe9.filesusr.com/ugd/ed1d2e_5940ae333ad348edab58f5c344b91260.pdf?index=true
    • https://6d0c6d30-55b9-4b7f-8145-34d11b484ddf.filesusr.com/ugd/8db56d_198063cccdcf406cb1f4b993d54584b2.pdf?index=true
    • https://s3.amazonaws.com/pubopelej/liftmaster_formula_1_not_working.pdf
    • https://s3.amazonaws.com/fujadabez/91433387894.pdf
    • https://s3.amazonaws.com/zagubip/jenopunujukobomof.pdf
    • https://s3.amazonaws.com/kodipopujufipig/65871747132.pdf
    • https://s3.amazonaws.com/lanaladu/gaxabixaxak.pdf
    • https://s3.amazonaws.com/rimejiguvif/52622585132.pdf
    • https://s3.amazonaws.com/fekazudabo/community_service_log_sheet.pdf
    • https://s3.amazonaws.com/legipalofi/eriskay_love_lilt_music_sheet.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d195.bin
3ba771524294a77d62380546d97f60586609cb3f4709f873823bdbe11f8c65f4
pdf-font-stream PDF embedded font (sfnt) at offset 0xD195 5228 bytes
font_01_sfnt_off0000e352.bin
4baa5fc3325fceb8673fa19f83451929edfae770df4fa1c57b0e8cb65206f19a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE352 10456 bytes