Malicious PDF — malware analysis report

Static analysis result for SHA-256 debfac36324d5ca9…

MALICIOUS

PDF

74.8 KB Created: 2021-03-03 06:32:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45d7a139ba3e84ba80f2dc7271529c06 SHA-1: 13c5f4207afc96889779c9fce2abc422d2744eaf SHA-256: debfac36324d5ca97387d7f3de6c64504020cb5e7bf422647a285daae9d6b2b2
96 Risk Score

Malware Insights

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

The PDF document contains embedded URLs, one of which is associated with a phishing lure regarding post-birth bleeding. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the document content suggest it is designed to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nipisod.ru/123?utm_term=is+it+normal+to+bleed+after+giving+birth
    • https://cdn-cms.f-static.net/uploads/4483388/normal_603d615031106.pdf
    • https://static.s123-cdn-static.com/uploads/4408713/normal_5fcbc9a04bf16.pdf
    • https://cdn-cms.f-static.net/uploads/4369503/normal_603bc631b5a7a.pdf
    • https://static.s123-cdn-static.com/uploads/4365553/normal_5fde003dbf21e.pdf
    • http://iqecoportal.ru/59938445489ufn2j.pdf
    • https://static.s123-cdn-static.com/uploads/4416654/normal_5ff112657fbda.pdf
    • https://cdn-cms.f-static.net/uploads/4369182/normal_601b45a597c0f.pdf
    • https://cdn-cms.f-static.net/uploads/4453560/normal_6022b0132c1b9.pdf
    • https://static.s123-cdn-static.com/uploads/4444636/normal_5fe0bd0b8693c.pdf
    • https://cdn-cms.f-static.net/uploads/4445116/normal_603e3adbd4db7.pdf
    • https://cdn-cms.f-static.net/uploads/4460473/normal_60120873d9a90.pdf
    • https://static.s123-cdn-static.com/uploads/4425506/normal_6004e84399094.pdf
    • https://cdn.sqhk.co/nekuripafi/NijZDid/70979498585.pdf
    • http://copyrightsupporthelpcenter.com/can_i_take_sat_in_9th_gradeg08z5.pdf
    • https://cdn.sqhk.co/diratukuz/cJLvNjg/nezixujetulidomolorewebe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://ravuxigud.epizy.com/chitralahari_telugu_video_songs.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_off0000e90f.bin
076ba36c47984269b1e6c26a4504a43e4c858e15dde66e094b2931cd9a49a03a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE90F 5456 bytes
font_01_sfnt_off0000fb74.bin
145ece4d04df9e8925cb1e14b87aca8b64fb3f13b93ab37ad672d0efcedc19b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB74 10196 bytes

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