Malicious PDF — malware analysis report

Static analysis result for SHA-256 105f7826dfd3fce0…

MALICIOUS

PDF

76.4 KB Created: 2021-05-24 16:44:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 0b876bab5ddf698e6555e0bfd9e3f2d6 SHA-1: fe68178144d9d78750ea14c6e5611ccdcae6986c SHA-256: 105f7826dfd3fce0d3a52c126ad1f6cfc75a3c52cff56087b94661ee72dad335
186 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm designed to direct users to external websites, with one prominent URL being lozipotod.ru. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded links point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://lozipotod.ru/wb?keyword=vivitar%20scale%20instructions PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381740/normal_601a2045483e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469104/normal_5ff924b332ca5.pdfIn PDF document text
    • https://bipuwuvi.weebly.com/uploads/1/3/0/7/130776795/kijedipotopep.pdfIn PDF document text
    • https://zibaxewax.weebly.com/uploads/1/3/4/6/134699960/sufujeraduwasaxim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379487/normal_603a14264f698.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476446/normal_5fdc171b66420.pdfIn PDF document text
    • https://zejinimab.weebly.com/uploads/1/3/1/8/131856072/929e03b8e56e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485698/normal_6016c9b05ac9e.pdfIn PDF document text
    • https://gogozofoful.weebly.com/uploads/1/3/4/5/134512065/789f805821b50.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/legesiliv/bolife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ba1d464-8d23-405b-b25d-27bea26d5b9a/how_to_clean_lg_dual_inverter_air_conditioner_filter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa67b877-edd6-43c9-934b-f7ec3897b375/dorutemalufede.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/xinime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75f13482-4338-43c7-9afe-012acbbc9c7d/benudu.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/worewati.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/calculadora_convertidor_de_ml_a_gramos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c7c77c8-1609-44ea-90b3-3939bacc7199/89880468326.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/motion_graphic_background_music_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd3502cb-e5d4-4757-a1ae-c02ef4586071/79751721798.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bb7212a-84c5-4ca3-af91-298816c85e0b/63187555553.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e25ea7e8-3ff0-4b66-b260-00d98faa6f38/fowidubojafulatoronej.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_off0000ed83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED83 4820 bytes
SHA-256: 5e0c19a083a787bc0e8c980a9b8017030273a9d51d3d2042e3b8c65d3e6afd46
font_01_sfnt_off0000fdfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFB 11176 bytes
SHA-256: eaf9a7cf1d6c2652c2928afe0b7d6d1f98229313433c353b5a1cc9a0839cf71a