Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce6b3cbd303acd59…

MALICIOUS

PDF

71.9 KB Created: 2020-12-28 17:46:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d778df8fa4388889b0d80f348a7225c4 SHA-1: 509aa4e8a306a0753fa3b8a2119a96787a7d03ff SHA-256: ce6b3cbd303acd5987d4ca7ed644c8f1dccbeb493618ebb8d9219194fb34e19e
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many hosted on disposable domains, suggesting a link farm or phishing operation. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically points to a tactic of using numerous small PDFs on disposable hosting to manipulate search engine results or distribute malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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/aws?utm_term=renunciation+of+executor+form+georgia PDF link annotation
    • https://febumade.weebly.com/uploads/1/3/4/7/134757335/nudurokizum_vevazekorenifu.pdfIn PDF document text
    • https://weduzoviduluwiz.weebly.com/uploads/1/3/4/3/134385862/sibovezerixi-kewak-garurawuma.pdfIn PDF document text
    • https://duzejuwilana.weebly.com/uploads/1/3/4/8/134879611/novinadi_davurozivivuv_pevunupo.pdfIn PDF document text
    • https://vodemilofokuse.weebly.com/uploads/1/3/4/2/134235674/jufexanefa.pdfIn PDF document text
    • https://gejabadofezeda.weebly.com/uploads/1/3/2/6/132681436/laxokow.pdfIn PDF document text
    • https://gibelugexafop.weebly.com/uploads/1/3/4/6/134687098/dusedal.pdfIn PDF document text
    • https://vadulovoke.weebly.com/uploads/1/3/4/3/134338980/1764363.pdfIn PDF document text
    • https://cdn.sqhk.co/loboremetoxe/if70LV5/95075267352.pdfIn PDF document text
    • https://cdn.sqhk.co/fovuxugo/uRAUZhi/hideo_kojima_net_worth_2019.pdfIn PDF document text
    • https://jokunotewe.weebly.com/uploads/1/3/5/3/135314966/59968628.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccb606aa-d6c8-439e-a89c-5ea2336d3e32/14816880241.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91a81ded-4ce3-490d-b010-e3089bfadf56/integer_exponent_properties_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b880c21a-938a-4ca4-887f-b89aa319e8c3/vuraxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c8b46b1-b610-427a-bff4-fb77c75d3379/lipetugekenuvuwufa.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/manual_cherry_picker.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_off0000dd26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD26 5064 bytes
SHA-256: 6da48e917ea20fa5a8c7f021fdd0070682c5e87cc0958ddd6260c53f987ba6b6
font_01_sfnt_off0000ee5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5F 10740 bytes
SHA-256: 6f139534afbe54bfdda2058c01b1989caa29952062e719221478da4824655f4b

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