Malicious PDF — malware analysis report

Static analysis result for SHA-256 1526164acc4e7c7a…

MALICIOUS

PDF

74.8 KB Created: 2021-04-04 13:23:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e8cd566a2db58a3ac1ccdded8c038829 SHA-1: 353db8474752509061c4d952d9b9f2b3494bbfac SHA-256: 1526164acc4e7c7ac1666ec110ce31de4141aaa090d2821bb52794786dd854ed
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 0.9990

Heuristics 5

  • 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 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://golowaki.ru/award?keyword=how+to+annotate+pdf+on+onenote PDF link annotation
    • http://canlisohbetim.net/410878251325u0mk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490263/normal_6035aadd555ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368985/normal_6046c00b18f1d.pdfIn PDF document text
    • http://reabook.online/33545515303d3j53.pdfIn PDF document text
    • http://shoppermarket.online/checklist_template_for_microsoft_wordemeob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489979/normal_600e0a90d6902.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477863/normal_5ff44db478650.pdfIn PDF document text
    • http://kernig.store/tubutenenatiladalekolor0nm4j.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465142/normal_60089eb2a8df7.pdfIn PDF document text
    • http://zespodsvetkoy.site/neo_lms_login_university_of_san_agustine1kpc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408713/normal_5fe7907271972.pdfIn PDF document text
    • http://lofitner.buzz/589353676329v8pe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454043/normal_5ff2b09a19d55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409110/normal_6019528f534d6.pdfIn PDF document text
    • http://epipog.com/21840702794w08wp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394079/normal_6013246c5d8ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416930/normal_602abe379030f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473642/normal_5feb20e939ff2.pdfIn PDF document text
    • http://verification-help.com/90911984001jqatn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368481/normal_5ff0733607caf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/56286914109.pdfIn PDF document text
    • https://s3.amazonaws.com/mevuzokekenojab/what_does_de_donde_es_tu_familia_mean_in_spanish.pdfIn PDF document text
    • https://s3.amazonaws.com/laginekux/arms_reach_3_in_1_co_sleeper_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/astigmatismo_pediatria.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/bhikari_movie_songs_pagalworld.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_off0000e92b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92B 4780 bytes
SHA-256: d13ff38ea64d95317580ff2ecc67c52edb493100b32e383cad1de3f77befe85c
font_01_sfnt_off0000f99b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99B 10480 bytes
SHA-256: 00b1adb144dc43ec5ac14b4768c80b359f735c1d7d713fa60131c7c3fceb71a1

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