Malicious PDF — malware analysis report

Static analysis result for SHA-256 12b6c8df5344ccb9…

MALICIOUS

PDF

82.6 KB Created: 2021-03-15 21:14:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1388891a31468835382873ff40559152 SHA-1: a59f2e3c01e5b52719cba3a43ae9cd682c5e5851 SHA-256: 12b6c8df5344ccb9b96c812486cda186f501d76c8aa5e7cfe036d595b26dcd9d
186 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many hosted on disposable domains, and is flagged as a link farm. The heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document may request sensitive information like private keys or passwords. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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
  • 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://mezovuduw.ru/strik?utm_term=what+are+common+vpn+protocols PDF link annotation
    • http://a1metromovers.com/evenflo_tribute_lx_convertible_car_seat_seat_belt_installationbhctj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368977/normal_6045fd3a8294f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369185/normal_60208cea38695.pdfIn PDF document text
    • http://xumobuzum.22web.org/the_lord_of_the_rings_the_two_towers_game_pc.pdfIn PDF document text
    • http://winoraama.space/jekukoksfnex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369328/normal_5fe9b7c7299c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469104/normal_6024a7db2f8e2.pdfIn PDF document text
    • http://rapalafipotofuw.iblogger.org/activesheet._showalldata_error_handling.pdfIn PDF document text
    • http://lewoluxadet.iblogger.org/wanisuxopiditifilaf.pdfIn PDF document text
    • http://dojemop.mywebcommunity.org/visualize_this_the_flowingdata_guide_to_design_visualization_and_statistics.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386609/normal_5fd2df56a9596.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380088/normal_60493e20eb938.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485016/normal_5fd630dd93dc0.pdfIn PDF document text
    • http://gramnews.xyz/zareba_200_mile_fence_charger_not_workingztn4w.pdfIn PDF document text
    • http://goodshopsales.xyz/how_to_tie_a_rope_knot_for_porch_swing6b9hb.pdfIn PDF document text
    • http://janafan.scienceontheweb.net/how_to_apply_decals_on_car_windows.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/54539065992.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/suxonenixes.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/kixadagob.pdfIn PDF document text
    • http://novilomarira.rf.gd/botulismo_alimentar.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/10494733589.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/litujoteravo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10771 5244 bytes
SHA-256: 333e57dd18935698ff7ced7a9d681cdb2d707078bb3f105fe6b738abfa43edfb
font_01_sfnt_off0001192a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1192A 10520 bytes
SHA-256: 57449ef7a6894c1ee66a96c55b2903b936536ef4b8a2148e285a1b1c6af520f0

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