Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e114867554acdb7…

MALICIOUS

PDF

66.5 KB Created: 2021-02-24 12:56:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 54773b48110a08aeea26222f38dbd94c SHA-1: 22dc40a244d5f185b9ecbb8e918a892b914ae246 SHA-256: 5e114867554acdb709cf28f7d2f13c5702a0046da6945917334d0bcbac5ee581
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/wix?keyword=mecp+installation+technician+study+guide PDF link annotation
    • http://freedate18.xyz/36225248751xag32.pdfIn PDF document text
    • https://zuxadozi.weebly.com/uploads/1/3/4/6/134662888/894939.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477164/normal_5ff3c05cb8033.pdfIn PDF document text
    • http://prizinsta365.online/luwumekolop3m7mm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405674/normal_5ff79141d2485.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403410/normal_601617bba049b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366366/normal_6034e3be49d42.pdfIn PDF document text
    • https://cdn.sqhk.co/lilapanorup/gdjdigx/bowling_western_sydney.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457296/normal_5fd7966a337c6.pdfIn PDF document text
    • http://usmileofficial.site/1275304475pv3jy.pdfIn PDF document text
    • https://wepopoxewu.weebly.com/uploads/1/3/1/1/131164118/mujuvopofokaxaper.pdfIn PDF document text
    • http://clientesdkb.com/bepedivikqe.pdfIn PDF document text
    • https://cdn.sqhk.co/bidekidarub/hj7W4ib/21984756408.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500417/normal_5fe2bc0f19482.pdfIn PDF document text
    • https://fufukarebalomok.weebly.com/uploads/1/3/4/3/134352968/3809176.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420013/normal_601320418fa3e.pdfIn PDF document text
    • https://cdn.sqhk.co/zupisopad/genzbgi/doom_eternal_levels_secrets.pdfIn PDF document text
    • https://cdn.sqhk.co/zupuguvawaj/6wiggI4/elvis_presley_greatest_hits_live.pdfIn PDF document text
    • https://cdn.sqhk.co/monasomeb/jfV5hip/gimobezegasaw.pdfIn PDF document text
    • https://dokegofixak.weebly.com/uploads/1/3/0/8/130873830/1488509.pdfIn PDF document text
    • http://copyrightshelpcenter.com/expression_web_4_templatescyvvb.pdfIn PDF document text
    • https://cdn.sqhk.co/kozuvurop/cgcnicY/auto_clicker_chrome_for_games.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c7dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7DC 5344 bytes
SHA-256: 96b27b3543b2ff0bc635cb0a971cbfa509cdb979148b3590ab613fa0fd54bd1b
font_01_sfnt_off0000da1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1D 10112 bytes
SHA-256: c562423c711af385c599987e3eb5d06ba4310ce388169c94dfda9d57957ffbc0

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