Malicious PDF — malware analysis report

Static analysis result for SHA-256 074f01f0aa0a04eb…

MALICIOUS

PDF

75.7 KB Created: 2021-06-08 18:07:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 6d700554ce2c63c4ae7259ef68a55e92 SHA-1: a946834911b3b43e17f14d7b97aea7149b9f1a3b SHA-256: 074f01f0aa0a04eb5670a1d6989c25d609963ec888e86f5209a11a6d8adbf7f7
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or SEO abuse. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://chcial.ru/pbw?utm_term=how+many+periods+did+the+dinosaurs+live PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414174/normal_602ef35ee83c0.pdfIn PDF document text
    • https://waluxine.weebly.com/uploads/1/3/4/7/134759732/e6b925b372.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495251/normal_5fe122c3e6777.pdfIn PDF document text
    • https://puzubogo.weebly.com/uploads/1/3/1/0/131070381/f53bd.pdfIn PDF document text
    • https://zevoxonigex.weebly.com/uploads/1/3/5/3/135300088/6352840.pdfIn PDF document text
    • https://pudukodup.weebly.com/uploads/1/3/1/4/131407572/5388772.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445333/normal_5fe16f4778098.pdfIn PDF document text
    • https://vemosigexirapi.weebly.com/uploads/1/3/4/3/134387812/nebapowufite.pdfIn PDF document text
    • https://rajarajo.weebly.com/uploads/1/3/1/3/131398110/5538270e4b62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425726/normal_60493109eba1a.pdfIn PDF document text
    • https://kufojinelimipi.weebly.com/uploads/1/3/0/7/130776518/boriji-fevafav-babozowafot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wotetidi.pbworks.com/f/xaxijevosoverusarag.pdfIn PDF document text
    • http://felefejimax.pbworks.com/w/file/fetch/144787128/insights_mains_test_series.pdfIn PDF document text
    • http://rukutuxeriro.pbworks.com/f/tavosubulokuligefiwezobi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbcb45a0-be28-47ea-b1a9-40910d15f851/boy_scout_pocket_knife_safety.pdfIn PDF document text
    • http://buvulareka.pbworks.com/f/74836059266.pdfIn PDF document text
    • http://pugaxigodaka.pbworks.com/f/83237342647.pdfIn PDF document text
    • http://lekuzax.pbworks.com/f/56414774052.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9db08b26-2c80-48d8-b4ff-9ca7279a1562/77317621577.pdfIn PDF document text
    • http://negovijalulu.pbworks.com/f/tu_long_te_main_lachi_mp3_song_download_pagalworld.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_off0000e937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE937 5412 bytes
SHA-256: 185e2950e149fe2c521c035319f4d970bab92fbd51b52630a5d67cc59c5035eb
font_01_sfnt_off0000fb8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8C 10592 bytes
SHA-256: c10c3d7636bede66ea9c0cc24b99bd53f33a2edeb31b99e38a0d222da7ea8299

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