Malicious PDF — malware analysis report

Static analysis result for SHA-256 071f48b3d656781f…

MALICIOUS

PDF

72.9 KB Created: 2021-02-20 12:30:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5fc3dddcb7c95aa4a7e14d5f78c6eea5 SHA-1: 9b69db7bce3569463f1a105672d3fe3f03de62e7 SHA-256: 071f48b3d656781f125402b783d04849fb883956089a5a5f357698d915f80169
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://maypoin.ru/strik?utm_term=lord+of+the+flies+short+summary+chapter+3 PDF link annotation
    • https://cdn.sqhk.co/zogobadakedu/ghia0jf/guess_the_cartoon_character_blocks_quiz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486535/normal_60119b3ca45e0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407064/normal_5fee774cbbf50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464311/normal_601332e7c0668.pdfIn PDF document text
    • http://kulokozataxat.22web.org/rapus.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392442/normal_5fef18605d77a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382770/normal_5ff4d6c15320f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366620/normal_5fd77d71e64a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414696/normal_602d9bf6badec.pdfIn PDF document text
    • http://mnatural.space/kabipapudabibobixuzifawwou3q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485450/normal_5febb5fb27d1a.pdfIn PDF document text
    • https://cdn.sqhk.co/xolanikipiz/ghjftjh/8685888664.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415767/normal_5fca2c26d4930.pdfIn PDF document text
    • https://cdn.sqhk.co/veletafi/iijhwBp/teppanyaki_grill_home_depot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zinimivozu.rf.gd/equifax_breach_free_credit_report.pdfIn PDF document text
    • http://kavaxix.rf.gd/setting_up_a_budget_in_google_sheets.pdfIn PDF document text
    • http://velumosak.epizy.com/far_cry_3_apunkagames.pdfIn PDF document text
    • http://vonanovab.epizy.com/vista_128_programming_user_codes.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE018 5604 bytes
SHA-256: cc35a381338ad08dd8e477efcc7e5924b1ce5f3deaaba2f8cbb574cfd0c3d4a1
font_01_sfnt_off0000f307.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF307 10292 bytes
SHA-256: 6878f839f39c97c5aaac3550778e0549b10d9a34cacb60a7595c1cfc675d1a19

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