Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2808203e10f4c48…

MALICIOUS

PDF

63.5 KB Created: 2021-01-11 08:36:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: d7ebe5cbc753da8f837ea90d80af9b8b SHA-1: 4ab4112d522c220fed345114e5360668e11718e8 SHA-256: e2808203e10f4c4850d102a602c7d148197d071e4581f018ef9c6cf1aa4d371b
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as Pdf.Phishing.Trojan. The presence of numerous external URIs, many pointing to disposable hosting and link farms, strongly suggests a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata related to wkhtmltopdf and a date, indicating it was likely generated programmatically to appear as a document. No scripts were extracted, but the overall structure and URL patterns are indicative of a malicious PDF.

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://traffnew.ru/aws?utm_term=applied+economics+cg+pdf PDF link annotation
    • https://jemodenot.weebly.com/uploads/1/3/4/5/134528334/tazifijibinobeb.pdfIn PDF document text
    • https://site-1171435.mozfiles.com/files/1171435/51483133045.pdfIn PDF document text
    • https://sugulone.weebly.com/uploads/1/3/2/7/132740418/3892043.pdfIn PDF document text
    • https://site-1178842.mozfiles.com/files/1178842/wapaditunowuwiwabov.pdfIn PDF document text
    • https://site-1168274.mozfiles.com/files/1168274/download_kpop_music_free_online.pdfIn PDF document text
    • https://site-1178590.mozfiles.com/files/1178590/new_testament_audio_free.pdfIn PDF document text
    • https://site-1166670.mozfiles.com/files/1166670/wudezojivibabexinikibe.pdfIn PDF document text
    • https://site-1229049.mozfiles.com/files/1229049/28097536198.pdfIn PDF document text
    • https://guvufusefek.weebly.com/uploads/1/3/1/0/131070011/tosuzavaki.pdfIn PDF document text
    • https://loruwudo.weebly.com/uploads/1/3/4/7/134738316/raxowazamukapimolos.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/nitajosasa/34726011656.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/rapisukesivobateg.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_off0000bddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDDB 5160 bytes
SHA-256: a6ec6a0dec1d18ad48e8b982d457fcdc29687cc43951fd1710895b5e709149cc
font_01_sfnt_off0000cf63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF63 9960 bytes
SHA-256: 62d68d73350c4f5c22162d175c8ed73b48bfafe918d8ea60279f77019c06d3ea

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