Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d0fc2e53dd41d2c…

MALICIOUS

PDF

72.5 KB Created: 2021-06-11 19:10:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c15f7fc40d1c07a78ee518c84978d2f5 SHA-1: ccf2605c42b10c536334bbcdeb1f51779d73590e SHA-256: 8d0fc2e53dd41d2c590472a763580b13f65ea723b294a19cdb68a2fb548bf537
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. The document contains numerous external URIs and is identified as a link farm, likely intended to redirect users to malicious sites. While no scripts were directly extracted, the PDF structure and numerous embedded URLs suggest it's designed to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://huntic.ru/pbw?utm_term=best+heroes+in+rise+of+empire PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4447250/normal_606a544cb8197.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447647/normal_6027236de1332.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372707/normal_605d9ce3ef231.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459483/normal_5fec594b1e9a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375352/normal_5ff3f4a8633e0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487208/normal_6009313261593.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4484990/normal_60b6002c6d1b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403270/normal_605423bc480d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489993/normal_6005420a747d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387417/normal_605803a635f46.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dajodovilav.pbworks.com/w/file/fetch/144684306/807208032.pdfIn PDF document text
    • http://kukuwowuxen.pbworks.com/f/82706480546.pdfIn PDF document text
    • http://mopegup.pbworks.com/w/file/fetch/144813672/90112366454.pdfIn PDF document text
    • http://tejudafo.pbworks.com/w/file/fetch/144451128/how_many_ventilator_modes.pdfIn PDF document text
    • http://kufavuva.pbworks.com/f/zinevafebatub.pdfIn PDF document text
    • http://sikovifif.pbworks.com/f/89011996079.pdfIn PDF document text
    • http://fisagibop.pbworks.com/w/file/fetch/145093104/real_commando_game_free_download.pdfIn PDF document text
    • http://kunozulig.pbworks.com/w/file/fetch/144754503/how_to_assess_the_students_learning.pdfIn PDF document text
    • http://ziriwuru.pbworks.com/f/entrepreneurship_successfully_launching_new_ventures_5th_edition_free.pdfIn PDF document text
    • http://zixereves.pbworks.com/w/file/fetch/144739215/whirlpool_gas_dryer_wiring_diagram.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_off0000deca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDECA 4948 bytes
SHA-256: 1da04c1f09aa7de241342f89cb3e05d754cae180250b027ca61a1938ffe897e1
font_01_sfnt_off0000ef78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF78 10936 bytes
SHA-256: 7294d6e2e5fb60e96601c291a14ad99d2bc736c09996ac0ffc640504455d158f

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