Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d2e58cff0e41d7c…

MALICIOUS

PDF

71.8 KB Created: 2021-02-15 15:52:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: dd507affc1b79375e1d287768da71dc8 SHA-1: b16472cf7f7dee3f779d6e2e4b4617817a14030d SHA-256: 8d2e58cff0e41d7ca07b0cb15730a9d706cf1ff8cbd068e7fe7f2857b3171881
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one prominent URL leading to a domain associated with malicious activity. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to 'excel test', aligning with phishing or malware delivery tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/strik?utm_term=what+does+a+basic+excel+test+involve PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421934/normal_5fd98147927da.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378171/normal_5fcf0afe9aaa0.pdfIn PDF document text
    • http://pubgucbayim.com/torilewidaiehv1.pdfIn PDF document text
    • https://cdn.sqhk.co/bijowiroma/igcjahj/japanese_character_translation_from_image.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414173/normal_60214b6d35180.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488090/normal_5fcdd04c06c15.pdfIn PDF document text
    • https://cdn.sqhk.co/nulogoxeja/ijaZhb4/rutunal.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421934/normal_5feb99c951ee5.pdfIn PDF document text
    • https://cdn.sqhk.co/kuvuzebilet/TfHhjjg/forex_trading_strategies.pdfIn PDF document text
    • http://thecabinets.xyz/95945370934m71ko.pdfIn PDF document text
    • http://1s.london/robux_generator_apk_pcu1eaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454047/normal_6021d2743da7b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366995/normal_5fede0d7c3688.pdfIn PDF document text
    • http://ijmalan.xyz/distance_measuring_using_laserfr3wi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452372/normal_6023d503e40f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443371/normal_600a11ea7df0c.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/levumoduf/40013460314.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/no_more_blocky_faces.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/string_format_nullable_datetime.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/champcash_pro_apk.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_off0000dba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA8 5212 bytes
SHA-256: d92e0b69a616ad640cda43e21cb5566921c317073d23d614e9a520c9dfa2f8a1
font_01_sfnt_off0000ed70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED70 10776 bytes
SHA-256: d0a8f4fcf8381f207bd4699bf8ddb5b0770aeaa9c9c79434c2f2523bcfc0bd1d

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