Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1211985d7cf1ed2…

MALICIOUS

PDF

78.2 KB Created: 2021-04-08 09:15:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 21caa719338ec8d8b32739c806d0dc5a SHA-1: 05072741301b9b6a5a2b408cdf547dc3c21f0f2f SHA-256: f1211985d7cf1ed23f19c100ed61022e49a21b15d010f9d77002016cd28c85b1
146 Risk Score

Malware Insights

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

The sample is a PDF file flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of numerous external URIs, including one pointing to 'ponafet.ru', indicates a likely phishing or malware distribution attempt. The 'SE_CALLBACK_LURE' heuristic further suggests a callback phishing or tech-support scam pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://ponafet.ru/strik?utm_term=harry+potter+and+the+sorcerer%2527s+stone+original+movie+poster PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4483081/normal_6058d8f972eb5.pdfIn PDF document text
    • http://everydayy.fun/wabedexigemekijosoxi7c56j.pdfIn PDF document text
    • http://wisitens.online/929804142493mpzf.pdfIn PDF document text
    • http://appless.space/how_to_set_time_on_an_armitron_digital_watchh0f2z.pdfIn PDF document text
    • http://trokot-newshop.online/zajeluwesiteka9z6ea.pdfIn PDF document text
    • http://serviceforyou.site/examen_final_matematicas_3_eso4xwvk.pdfIn PDF document text
    • http://ihsteam.ru/2554541161e5t61.pdfIn PDF document text
    • http://oneitstore.pro/the_sign_and_the_seal_graham_hancock_free_downloadmiwke.pdfIn PDF document text
    • https://cdn.sqhk.co/limiwebu/jfgcjiL/17576593362.pdfIn PDF document text
    • http://ch-redirect.icu/how_to_treat_arthritis_in_shoulder_blade4nzwi.pdfIn PDF document text
    • https://cdn.sqhk.co/jidulopavoji/hjdiYWR/ufo_hunters_handbook.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460055/normal_6011db69c70b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380540/normal_603a21f4e7d4c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479904/normal_5fe3816694a88.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/midaguvimabof/turbulent_boundary_layer_theory.pdfIn PDF document text
    • https://3c1efe6f-6e34-41bb-a2c4-2be85dd3cb33.filesusr.com/ugd/41f880_e802eeb67ebf4af2a0024761d81d9953.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/gutowazekajefovuro.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/samsung_tv_remote_connect_to_soundbar.pdfIn PDF document text
    • https://6d4cd3b7-91e9-43ac-92b9-205473f1e50d.filesusr.com/ugd/28146e_41cb892dce0f42629e8f7a668a0d11ae.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/damerirazib/influenza_treatment_guidelines_us.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_off0000f1ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AE 5644 bytes
SHA-256: bf93de2210d6b7973044e5f9f33c5cdb4db27ab1071e5abbe3ed071f4aac0a08
font_01_sfnt_off000104cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104CB 11300 bytes
SHA-256: ac2f466f60fc9d415500b49357247e90b0c8ed2a575ea3df1265fd7200f0f9eb

Open this report in the interactive analyzer, or submit your own file for analysis.