Malicious PDF — malware analysis report

Static analysis result for SHA-256 2df127b4ec6d9ae8…

MALICIOUS

PDF

72.8 KB Created: 2021-01-23 09:05:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 522add4d29c5c5d20f6428bb5756fe71 SHA-1: 15b27129e55813bf98741a76790c7e7713d22335 SHA-256: 2df127b4ec6d9ae86031a74c296586086dead3e3d0aa64c002c4ce53e63c6700
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 critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains numerous embedded URLs, with at least one pointing to a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

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/123?utm_term=slotomania+free+coins+2020 PDF link annotation
    • http://gigurokubi.66ghz.com/31197652308.pdfIn PDF document text
    • https://nimaxosonoj.weebly.com/uploads/1/3/4/8/134897368/5692029.pdfIn PDF document text
    • https://rurasaza.weebly.com/uploads/1/3/4/8/134869927/mefanaf_gevaje_gazona_dafurejuju.pdfIn PDF document text
    • https://togawikanow.weebly.com/uploads/1/3/5/3/135320583/boxazovom.pdfIn PDF document text
    • https://jefaganogebe.weebly.com/uploads/1/3/1/4/131437435/kapinasaguv.pdfIn PDF document text
    • https://cdn.sqhk.co/vupapevixu/aBkjghg/escape_impossible_revenge_safe_code.pdfIn PDF document text
    • https://site-1178950.mozfiles.com/files/1178950/7979303687.pdfIn PDF document text
    • https://site-1173675.mozfiles.com/files/1173675/suwiv.pdfIn PDF document text
    • https://site-1176882.mozfiles.com/files/1176882/ant_ward_tmnt.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/GgihQeZ/hip_hop_ballet_movie.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rebobimakefeli.epizy.com/tadoxixikarukeliguzinag.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/short_story_for_learn_english.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/imo_app_video_call_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/piano_song_fur_elise.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_off0000dfcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCB 5404 bytes
SHA-256: bc59d61e11cf646af1a8c3138d306218f924821ebdec45941f9e9c0702079e37
font_01_sfnt_off0000f20f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20F 10644 bytes
SHA-256: 46def32658c7aed76de0e922ee3139fbd62ba1b99a7118fdb1cfd30761411ef1

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