Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc4c139e210f4fee…

MALICIOUS

PDF

70.9 KB Created: 2021-03-21 22:45:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2965daaf6284cc6749004cecadb8012e SHA-1: dc1040249952ba038421c75708a2d8070ab79eb3 SHA-256: fc4c139e210f4fee1db3518b9571438ba4a4b4c19215635c60b6d23728508354
96 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body is heavily obfuscated, but the presence of the external URI suggests an attempt to trick the user into visiting a malicious resource. No scripts were extracted, but the PDF structure itself facilitated the embedding of the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://midufefew.ru/wix?keyword=thinking+cap+hat
    • https://cdn.sqhk.co/bopopujag/gfifFih/70292817727.pdf
    • https://cdn-cms.f-static.net/uploads/4468820/normal_6032c8469eb6b.pdf
    • https://cdn-cms.f-static.net/uploads/4484118/normal_6015ebbef0d7b.pdf
    • https://cdn-cms.f-static.net/uploads/4409992/normal_6023c6591880f.pdf
    • https://cdn.sqhk.co/suwapipejob/HCijgiV/kefalafanasoxewutejezeb.pdf
    • https://cdn-cms.f-static.net/uploads/4387706/normal_60557b41e3d79.pdf
    • https://cdn.sqhk.co/wufotubi/BNMgegc/zivesi.pdf
    • https://cdn.sqhk.co/jasekazus/ChhRjfB/96098276419.pdf
    • https://static.s123-cdn-static.com/uploads/4366055/normal_5fed488383e5a.pdf
    • https://cdn.sqhk.co/zezetemirag/D65haHn/22261408187.pdf
    • https://cdn.sqhk.co/wesaduleb/igihfhg/14882728107.pdf
    • https://cdn-cms.f-static.net/uploads/4462976/normal_60472327a8b86.pdf
    • https://cdn-cms.f-static.net/uploads/4447273/normal_602e1464e87c5.pdf
    • https://cdn.sqhk.co/naziwixolagu/jhgchag/dynasty_warriors_7_female_characters.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mufukep/nawokobewanoxaxitob.pdf
    • https://s3.amazonaws.com/sorapobuk/how_to_convert_fructosamine_to_hba1c.pdf
    • https://s3.amazonaws.com/bidurudilidujug/67488999500.pdf
    • https://s3.amazonaws.com/pezofut/minecraft_lava_creeper_skin.pdf
    • https://s3.amazonaws.com/bejexe/overtime_work_format.pdf
    • https://s3.amazonaws.com/jiwisigetizoxif/dorevovu.pdf
    • https://s3.amazonaws.com/tuletivotarupu/flipkart_bed_sheet_cover.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_off0000d51e.bin
68eefb796b4e175fd7002bfc763df78cf78b0d74631019d0fc01ba4703799fba
pdf-font-stream PDF embedded font (sfnt) at offset 0xD51E 4904 bytes
font_01_sfnt_off0000e5d5.bin
21f83c858940734bdbb077c7147c8140c281cb706056ace8894fcd0f213c986d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D5 11648 bytes