Malicious PDF — malware analysis report

Static analysis result for SHA-256 61278a0a1fd752a0…

MALICIOUS

PDF

75.8 KB Created: 2021-01-24 14:41:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: d7b3df0daf3f5d72105b851f0eb8139d SHA-1: 43eee158ff920a5c46ddb87bd9bf201e2ded3e01 SHA-256: 61278a0a1fd752a0ebe92a9873b9343529d0ac23308261f9b38161f29456c856
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links to various PDF files hosted on disposable domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document designed to redirect users.

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 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://traffset.ru/123?utm_term=canton+ny+school+taxes PDF link annotation
    • https://cdn.sqhk.co/gofelaxes/3aQuPgr/pubopa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482018/normal_6002210a66bbf.pdfIn PDF document text
    • https://cdn.sqhk.co/defegitip/50Lpvgh/criminal_case_hidden_object_game_online.pdfIn PDF document text
    • https://cdn.sqhk.co/vuramufef/L96Uzie/jetupuvi.pdfIn PDF document text
    • https://cdn.sqhk.co/wudawagirus/XjggYjd/cut_the_rope_game_download_for_windows_10.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/agdj6ji/my_town_hospital.pdfIn PDF document text
    • https://cdn.sqhk.co/xenotami/hjaifia/92047496924.pdfIn PDF document text
    • https://cdn.sqhk.co/rijakobebux/XqlDkDk/wholesale_japanese_nail_art_supplies.pdfIn PDF document text
    • https://cdn.sqhk.co/senagoxosog/EQjbfhg/tour_texas_a_m_commerce_basketball.pdfIn PDF document text
    • https://reropazorulofo.weebly.com/uploads/1/3/4/4/134437501/velugiluba_sewitezuder_madawurigepan_kinutapiki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489428/normal_5fd9b287dd133.pdfIn PDF document text
    • https://lagisarer.weebly.com/uploads/1/3/4/1/134131240/dekarakuzi.pdfIn PDF document text
    • http://ebay-coupon.ru/54900621217lvm7p.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/gnhgcia/58822965252.pdfIn PDF document text
    • https://denijebif.weebly.com/uploads/1/3/4/5/134584122/wekisidimok.pdfIn PDF document text
    • https://cdn.sqhk.co/tijinujul/heicwya/never_cease_to_amaze_me_synonym.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479679/normal_5fd795173e1e4.pdfIn PDF document text
    • https://wabalolosezuluf.weebly.com/uploads/1/3/4/4/134462862/ralijepo-nibulit-bunozibuzob-zegobap.pdfIn PDF document text
    • https://xanalefude.weebly.com/uploads/1/3/1/4/131411596/puxigujigo-tawikexotapiv-sawefuvila-lodufajosaw.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/ijI2rgf/bright_dots_in_vision.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ec0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0B 4868 bytes
SHA-256: 40333f26d13d1d7459bd346060e7f0c3b812eb20df9abe19e567c96717adf335
font_01_sfnt_off0000fc9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9F 10852 bytes
SHA-256: 97a13ff0096075748fcd6759f409cd09647f1e717b4e469e31bf6d09771c660d

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