Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fd5d93d8af00753…

MALICIOUS

PDF

83.1 KB Created: 2021-05-19 22:01:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7f5b78e6fe145923a1722d39ebe6a0f3 SHA-1: e141a6605dd4388fc0079096b599fa3ff2aa6997 SHA-256: 0fd5d93d8af00753bdf97ff1949e8d1931f059f2c9a3a5e1d4d192f1f98769d1
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, a technique often used in SEO link farms to manipulate search engine rankings or distribute malicious content. The embedded URL `https://ponafet.ru/strik?utm_term=mht+cet+2015+question+paper+with+solution+pdf+download` suggests a lure related to exam papers, while the PDF itself is flagged by ClamAV as `Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0`. The ML classifier also strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ponafet.ru/strik?utm_term=mht+cet+2015+question+paper+with+solution+pdf+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403816/normal_6037bf1916ccf.pdfIn PDF document text
    • https://sufosuzupunu.weebly.com/uploads/1/3/1/3/131379650/zijudepogesok_rexenagipen_zoginijobe_dezanotirubomeb.pdfIn PDF document text
    • https://liletalezawo.weebly.com/uploads/1/3/4/5/134591830/jinumedobumiv.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/33201877357.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417535/normal_5fd64bcb5d34f.pdfIn PDF document text
    • https://pazolumaf.weebly.com/uploads/1/3/4/3/134356568/jitapixuxa-varaxa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403820/normal_5feb5f29eaa91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367631/normal_606cdccbc6fff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465024/normal_604ddc291c971.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421966/normal_5fda4b4b922bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427544/normal_606b503e52ba2.pdfIn PDF document text
    • https://labaveboto.weebly.com/uploads/1/3/4/6/134611097/gikesebaxar-sabegofiju-mijolawizore-foxofolewiza.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/wakelozapedagowede.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474222/normal_60222b4458b8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389394/normal_60390d5504ba7.pdfIn PDF document text
    • https://juvedolukojubis.weebly.com/uploads/1/3/2/6/132682904/womavamuwakejafi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2fd4596-da3d-4c08-a923-c9a5273efa69/landice_treadmill_safety_key_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e3855dc-b22b-4be9-92c3-386a3620aa51/stihl_fs_56_rc_wont_start.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eacc6565-a07f-4711-b2b5-612c2c10fd51/noughts_and_crosses_novel_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9649198d-b981-4c77-9a72-ac4cf69c7d0f/39677797693.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bab73be-2669-4353-bb08-454fea1062b0/cuanto_son_100_gr_de_mantequilla_en_cucharadas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/801bfccf-7e3c-4564-bdae-9202a525bcc1/wudovidu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45d27e62-c8fa-423e-aee5-cc3b5344d4a5/printable_bunco_score_sheets.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FB 5916 bytes
SHA-256: 40d357ea45896294554d7339cbaf6358ad01774e01a82049731e4ecfbcb1a57f
font_01_sfnt_off00010b46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B46 10772 bytes
SHA-256: e43c20c052a48824f31898c0203c916d80b29422a2543c98712cafad1b15ff35
font_02_sfnt_off00012fc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC6 3224 bytes
SHA-256: 36587f8a3ed9c194a2327d904e192f3bb49ca9b952979ba816008cea1092c9f1