Malicious PDF — malware analysis report

Static analysis result for SHA-256 02208c27516136fb…

MALICIOUS

PDF

85.8 KB Created: 2021-04-12 02:56:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1a5b319feca4904c498fe93cdfce02de SHA-1: 50b7972a3c33238e65ecbc08bc3c1c8dbdc7b8a6 SHA-256: 02208c27516136fb3c6500cfccfb3dac2317e0c3a1ebc8493e0e0aa0d39f3279
126 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, specifically as a phishing trojan. It contains numerous embedded links pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, suggesting the document is designed to host a large number of redirecting links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/strik?utm_term=what+kind+of+oil+do+toro+lawn+mowers+use PDF link annotation
    • http://italiahot.space/sotegegonivatakuwufumuxnwdk.pdfIn PDF document text
    • https://cdn.sqhk.co/bisuligiga/gHjiifh/morudikuf.pdfIn PDF document text
    • http://morpeoplelife.ru/verizon_ellipsis_jetpack_monthly_planstdvza.pdfIn PDF document text
    • http://stikc.xyz/best_android_tablet_2018_nz2jtxj.pdfIn PDF document text
    • http://jewofuvivonog.getenjoyment.net/topovujo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365594/normal_5ff5f892570f1.pdfIn PDF document text
    • https://cdn.sqhk.co/mifigatira/eBvfhfo/retaduzupowovizukogiseke.pdfIn PDF document text
    • http://vnds-super.space/140646538735uwbs.pdfIn PDF document text
    • http://copyrightprivacy.site/redream_premium_apk_freeah8jh.pdfIn PDF document text
    • http://lozuzaragujeb.mypressonline.com/how_to_crochet_a_square_in_round.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454162/normal_6065c9c2aef57.pdfIn PDF document text
    • http://mufutekuson.getenjoyment.net/teaching_vocabulary_for_young_learners.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7ef5d8b8-74ac-4e0a-b0a0-fa61ca6462a8.filesusr.com/ugd/23e9be_18b71fb82d71467cb861c343e918fa41.pdf?index=trueIn PDF document text
    • https://c6111751-42b6-464f-a8b1-832d492ff999.filesusr.com/ugd/3d0627_7023bad75b6949a7a17f806d29ee106b.pdf?index=trueIn PDF document text
    • https://1801fa0f-56e4-4894-8452-b8e06651d4be.filesusr.com/ugd/868401_54492d468cf24d6b99a8fbfebf3d8a53.pdf?index=trueIn PDF document text
    • https://63209029-b609-4f89-80e5-af59b408cdb4.filesusr.com/ugd/0713e6_5d3bcacf3fb646d9b0453d3f7de243e2.pdf?index=trueIn 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_off000113fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113FD 5316 bytes
SHA-256: 210396ae6b059977a9202cc4ad8998af64debfea500ed94005ad5c69aac858bd
font_01_sfnt_off00012601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12601 10540 bytes
SHA-256: ea4caa4c6800cb82d5f1641525a49947ac5e533e3a39764f6201374471659120

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