Malicious PDF — malware analysis report

Static analysis result for SHA-256 178664cd7c6bf3d3…

MALICIOUS

PDF

80.1 KB Created: 2021-04-17 05:51:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7c968f0daabc0ba0d35c6fbf18f5ca77 SHA-1: 73245b126a5ddc98e0451a0ef81f83224f59c2ce SHA-256: 178664cd7c6bf3d3ef19332f1d9a17aca8856e18a1f3c4925b7b27a622067475
126 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains, indicating a link farm designed to redirect users to potentially harmful content. The presence of external URIs and the classification as a link farm strongly suggest an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://gimoguvi.ru/strik?utm_term=little+house+on+the+prairie+cast+pics PDF link annotation
    • http://kefets.xyz/why_does_my_ps3_game_says_corrupted_data4dr1h.pdfIn PDF document text
    • https://lumezoti.weebly.com/uploads/1/3/4/8/134863392/kadawapepugi.pdfIn PDF document text
    • https://cdn.sqhk.co/parikozug/jfwau0w/41919325302.pdfIn PDF document text
    • http://arendagg.xyz/titolozedkc79w.pdfIn PDF document text
    • http://bbbbbbbbeeee.space/bakulaxelubuxikuwemuhyh10.pdfIn PDF document text
    • http://reduslim-ufficialesito.site/digujudidabomevir3407f.pdfIn PDF document text
    • http://rimka.xyz/que_es_una_imagen_panoramicantte1.pdfIn PDF document text
    • http://betflixguvenilirmi.com/chess_game_free_3d0a1lc.pdfIn PDF document text
    • http://vashobereg.com/black_and_decker_crisp_and_bake_air_fryer_convection_toaster_ovenc70r8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413570/normal_606ea0975da55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391903/normal_6010e7f57164b.pdfIn PDF document text
    • http://xruhdfo.site/25240753396wk92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488855/normal_6019f77b2d629.pdfIn PDF document text
    • http://mobile-media.moscow/json_format_in_confluencec7mk1.pdfIn PDF document text
    • https://wajigigo.weebly.com/uploads/1/3/4/5/134588105/zubizuma.pdfIn PDF document text
    • https://fulotetaputu.weebly.com/uploads/1/3/2/7/132740707/foloxudep.pdfIn PDF document text
    • https://somusepuxe.weebly.com/uploads/1/3/1/0/131070447/salilavaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409403/normal_600d3db9babde.pdfIn PDF document text
    • https://cdn.sqhk.co/xibidodoko/a0EaTEe/vojefopenizirikofurawab.pdfIn PDF document text
    • http://republvinb.fun/9638743554cwluy.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/628a0a2e-ac40-47c5-8fb9-ded2ad817f07/34466949382.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d213cf91-f46a-4633-9946-283e72cbf0a6/57618233275.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e07a5430-8705-4110-8f0c-3fc6450cad11/breitling_aerospace_avantage_e79362.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_off0000fcaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAF 4960 bytes
SHA-256: 504dcab6ee8b5cc0e4c8a089863d67af828f4e9dd107a660ab731c19c2d8b1b3
font_01_sfnt_off00010d86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D86 10416 bytes
SHA-256: dc419ea75d1213f77a210a59dde045559a93a64f506bd0e2d3080e74cb3d48fb

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