Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fe0b7932328aefe…

MALICIOUS

PDF

77.6 KB Created: 2021-03-22 04:54:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4d4270e28e648a84dae6445d0ccb2096 SHA-1: b8734b4d7b2944842dad2f90a5b8ad12f528f5aa SHA-256: 9fe0b7932328aefe479d27fe988f783d4e81a29aec936d507d0cdeaea97236d2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://xajibur.ru/strik?utm_term=best+balance+exercises+for+parkinson%2527s PDF link annotation
    • https://nabidojanafo.weebly.com/uploads/1/3/4/4/134455463/9616448.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419626/normal_6046249d1af3a.pdfIn PDF document text
    • https://xoxopurotawasuj.weebly.com/uploads/1/3/4/6/134651309/wokud.pdfIn PDF document text
    • https://cdn.sqhk.co/surikuzezun/hcGg1jc/18531170771.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500692/normal_603ab7ec2195d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450257/normal_604cf7c0cc5e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381976/normal_60013abe3f441.pdfIn PDF document text
    • https://cdn.sqhk.co/dedikifefisu/jhbiflV/36227378543.pdfIn PDF document text
    • https://todusoxi.weebly.com/uploads/1/3/3/9/133999566/6919629.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372104/normal_5ff4a5391e1f7.pdfIn PDF document text
    • https://bilewemebit.weebly.com/uploads/1/3/5/9/135964156/lexekogufoledija.pdfIn PDF document text
    • https://cdn.sqhk.co/pigexebobe/eoiajc4/step_by_step_magic_snake_36_piece_shapes.pdfIn PDF document text
    • https://tujezagen.weebly.com/uploads/1/3/4/7/134775207/todonebudumepe_tegubajibik_zelulux.pdfIn PDF document text
    • http://pekokaxa.22web.org/jedetevujo.pdfIn PDF document text
    • https://tolibalib.weebly.com/uploads/1/3/4/7/134714968/357829.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://bimumebuzof.epizy.com/hdencoders_tamil_movies.pdfIn PDF document text
    • http://zijozuf.epizy.com/solve_quadratic_equations_by_factoring_ppt.pdfIn PDF document text
    • http://dedafozun.rf.gd/75897652406.pdfIn PDF document text
    • http://timivaferegigor.rf.gd/length_conversion_worksheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e40d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE40D 5152 bytes
SHA-256: f94640e774ef1bf7cc785e37b511b7031bacd126076c57f2a14620f4a870b3aa
font_01_sfnt_off0000f59c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59C 11028 bytes
SHA-256: 8e3b0f62e4401be564012b33cbb52244f1f535e70bacdc8c6f250c0c8f4dd620
font_02_sfnt_off00011968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11968 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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