Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ac4ab472be7d709…

MALICIOUS

PDF

67.8 KB Created: 2021-02-20 06:46:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 8fa7a099366907c68a56416e31e1c477 SHA-1: 542c261a50c0ce4f0469e394da5dcded1f00be2d SHA-256: 7ac4ab472be7d709a3b8bf56223bc46328f3334f5c2981dfb69653430c51a991
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 0.9997

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://jottigo.ru/wix?keyword=anne+carson+plainwater+pdf PDF link annotation
    • http://arthromedshop.xyz/tebizulewatetekuvaqvp7u.pdfIn PDF document text
    • https://jinikegubu.weebly.com/uploads/1/3/4/8/134873825/dovolikisedat-rufizosolur-minopasefad-nibun.pdfIn PDF document text
    • https://cdn.sqhk.co/vimexuda/d4Ugd7Z/netflix_party_chrome_extension_download.pdfIn PDF document text
    • http://lezapogogaz.iblogger.org/24616470343.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389108/normal_5ff0b16dd92d8.pdfIn PDF document text
    • http://national-verifyteam.com/biwewabenixisax8wqp9.pdfIn PDF document text
    • http://nekevofitoruzat.22web.org/situlozirixejaveparepivem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xubedoper.epizy.com/gubejozewak.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/defensins_antimicrobial_peptides_of_innate_immunity.pdfIn PDF document text
    • http://vubixegigag.rf.gd/romeo_and_juliet_act_v_scene_3_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/naliluk.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_off0000ce85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE85 5228 bytes
SHA-256: b1aef6243e05e8967ab6c57baa94b607555a77935aaab6de1078ce8a2aec44c3
font_01_sfnt_off0000e073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE073 10096 bytes
SHA-256: b4e881b414ebd89d6778a2f77fa2c57c0e6bbd98009711b508e0850175169ed9

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