Malicious PDF — malware analysis report

Static analysis result for SHA-256 46f085aba5cd352c…

MALICIOUS

PDF

93.5 KB Created: 2021-03-30 01:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1c823f9829019c193090611187f27994 SHA-1: 5b8fabaf8ac7e66fdd4c19b1a74a6ecf057fb79c SHA-256: 46f085aba5cd352c0cb573485fcf589f83a5b883ce400795784204040f099cbd
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/wix?keyword=history+2+crossing+the+line+characters PDF link annotation
    • https://rixafewokeget.weebly.com/uploads/1/3/0/7/130739987/6350f9fb79a9.pdfIn PDF document text
    • http://wbigs.space/powisezirokinewe4lvn.pdfIn PDF document text
    • https://naduvita.weebly.com/uploads/1/3/5/9/135973463/292ba67.pdfIn PDF document text
    • https://womomoko.weebly.com/uploads/1/3/4/8/134848640/19a6ac.pdfIn PDF document text
    • https://vezajufarazigur.weebly.com/uploads/1/3/4/2/134265717/1969497.pdfIn PDF document text
    • http://sfr-espace.best/27872621738io5sy.pdfIn PDF document text
    • https://vijisazegogufob.weebly.com/uploads/1/3/1/3/131380966/2294434.pdfIn PDF document text
    • http://lewuvumo.sportsontheweb.net/answer_sheet_toeic.pdfIn PDF document text
    • http://tosefabebiribow.scienceontheweb.net/80451092113.pdfIn PDF document text
    • https://reledizov.weebly.com/uploads/1/3/0/7/130775001/2427833.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454435/normal_60067813b42f8.pdfIn PDF document text
    • http://snegny.com/2005_nissan_pathfinder_problems_transmission1kghp.pdfIn PDF document text
    • https://geliwesirodired.weebly.com/uploads/1/3/1/3/131382982/kujisaruw-xatewuzomu-mositakaviditom.pdfIn PDF document text
    • https://vofodiwe.weebly.com/uploads/1/3/5/3/135350815/fd35d6e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406466/normal_5fe164a0e116e.pdfIn PDF document text
    • https://reratedazakowim.weebly.com/uploads/1/3/1/3/131378897/gonelolifagirimus.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381320/normal_5fc9a38b7eb17.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://giworutiw.myartsonline.com/somewhere_over_the_rainbow_chords_in_c_major.pdfIn PDF document text
    • http://jasesazolaf.myartsonline.com/4287526972.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/59648707551.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/33825367654.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_off000110f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F2 9344 bytes
SHA-256: 0fd64f710362de41b0ed8ae8f26bb6ada4c149cf8fbf36ca5dc5405fbf787d65
font_01_sfnt_off00012fed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FED 5256 bytes
SHA-256: 4a3cc46f9a3cfed1ff1b52bbd241558f80985c3ace6de27bb63a3be539da0a39
font_02_sfnt_off000141d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141D3 11276 bytes
SHA-256: feae8bbceb1400afb725b17296e3bbd711a7fc90222a13e25bf446fcd318c482

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