Malicious PDF — malware analysis report

Static analysis result for SHA-256 05c4b63bc192dc61…

MALICIOUS

PDF

69.5 KB Created: 2021-03-03 08:45:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0c14a34ad27ecd372a7546cc6b41ab07 SHA-1: deb59f027276ee73050def84fd9ac1abb1e91059 SHA-256: 05c4b63bc192dc6175591136ab43a29cfe77873a9a9a081c902dc495c61c384c
124 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to malicious sites, likely for a phishing or malware download campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9662

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://crophysi.ru/award?keyword=guitar+sheet+music+no+tab PDF link annotation
    • https://cdn.sqhk.co/kevovevude/ajbghGn/golf_battle_cheats_deutsch.pdfIn PDF document text
    • https://cdn.sqhk.co/vilubofi/gchhU9A/marlboro_ice_blast_australia_mg.pdfIn PDF document text
    • http://monoga.space/adornos_navideos_manualidades_para_clasenkrzr.pdfIn PDF document text
    • http://sdek-24.cc/josalajulukunisisu3fl.pdfIn PDF document text
    • http://artrosil.xyz/free_coloring_sheets_of_carsye57k.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465555/normal_5fdedc703d76b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479674/normal_5fe636e29db73.pdfIn PDF document text
    • https://revowerixes.weebly.com/uploads/1/3/1/6/131607662/muxuxaxuxejobirituxe.pdfIn PDF document text
    • https://cdn.sqhk.co/zinoliwomi/g0jcr96/bolalad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445340/normal_60061854cd4d4.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/bdmhdDJ/fawawozogaxuruxupizajur.pdfIn PDF document text
    • https://cdn.sqhk.co/ritasuxa/hjjfy0B/10th_maharashtra_board_navneet_digest_download.pdfIn PDF document text
    • http://lnstagramsupportinfo.com/849132727772uzqb.pdfIn PDF document text
    • https://cdn.sqhk.co/sabiwizi/eSigghr/dadakuwobifa.pdfIn PDF document text
    • https://morisoxurekes.weebly.com/uploads/1/3/4/4/134464458/8348820.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376404/normal_6029761960e80.pdfIn PDF document text
    • http://weex.info/88077520610b32og.pdfIn PDF document text
    • http://blankid.ru/vehicle_information_app_governmentchh1k.pdfIn PDF document text
    • https://cdn.sqhk.co/pinebiven/oghgXjb/xefekezowifubamediba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e8b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B7 5176 bytes
SHA-256: 93e61200ccb7afe7b317200c5a175f4bdf1de53c576b9b101807a2fea825e9a2