Malicious PDF — malware analysis report

Static analysis result for SHA-256 df5eb219a463694d…

MALICIOUS

PDF

85.5 KB Created: 2021-03-15 18:27:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 920da640792d5dfc6244b499860f03b1 SHA-1: 8d72ed53b50a0b12760286c843e5ee4d431158bf SHA-256: df5eb219a463694d41bd3358edc741c048db76806be2722f92c2eb9c05459ff1
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 0.9992

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://druttle.ru/wix?keyword=gopro+hero+4+user+manual PDF link annotation
    • https://jipoditilab.weebly.com/uploads/1/3/1/4/131407274/16a67a6f954d26e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408706/normal_5fed91fc5d4f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485704/normal_603522002e92e.pdfIn PDF document text
    • https://cdn.sqhk.co/vofonowul/gfQO1hh/vemodixoro.pdfIn PDF document text
    • http://nigavereke.mygamesonline.org/polar_ft60f_pur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408858/normal_603d3ee8915ef.pdfIn PDF document text
    • https://cdn.sqhk.co/gebemiwisero/Ih5GhiL/bemitaf.pdfIn PDF document text
    • https://cdn.sqhk.co/bibobovezave/jhhbfWf/sniper_ghost_warrior_2_gameplay_xbox_360.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388063/normal_604debd877d42.pdfIn PDF document text
    • http://widonatozeg.mypressonline.com/the_gym_teacher_from_the_black_lagoon_comprehension_questions.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408186/normal_603d7b2a432ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369514/normal_604d40a599944.pdfIn PDF document text
    • https://cdn.sqhk.co/xekobigi/ibThb3V/metulemowugijukolemigoke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376088/normal_604e3df8ef4a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464532/normal_5ff8b3c1137cb.pdfIn PDF document text
    • https://cdn.sqhk.co/dameseri/ahdjbgc/zolurowuduxelotumorap.pdfIn PDF document text
    • https://wujabadatudipox.weebly.com/uploads/1/3/5/4/135400083/6652597.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445129/normal_5fc8dacbc4c0e.pdfIn PDF document text
    • https://cdn.sqhk.co/fekimevexi/heheqLd/qualitative_health_research_journal_author_guidelines.pdfIn PDF document text
    • http://gapilojazixo.getenjoyment.net/what_is_the_benefit_of_transformational_leadership.pdfIn PDF document text
    • http://mutujejeturuduf.medianewsonline.com/34277259994.pdfIn PDF document text
    • https://cdn.sqhk.co/sabepakofo/gd8YjeX/cell_sandbox_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pelebirepopo.onlinewebshop.net/80922627708.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_off000111fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111FA 5180 bytes
SHA-256: 31e86d84c4f9815b65c0630ea06aa29daf0acbba54a47b47e008ccce4f57e4fd
font_01_sfnt_off00012372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12372 10768 bytes
SHA-256: ef9aa3d68c71a92a55dbbcc1d3eeb7cab668d57afb6e20d910ea20275437c3f5

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