Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaba8a62be6c98cb…

MALICIOUS

PDF

93.1 KB Created: 2021-01-28 12:23:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: c521d0926d56c1470202482dae78aea4 SHA-1: 945894e6ff7c9c45010a12455c02d222eab0e262 SHA-256: aaba8a62be6c98cb1a53476a4449c14570e34a6ed93571ef743326b352baa041
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm designed to distribute further malicious content or phish for information. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a non-clustered link farm on disposable hosting.

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://bologen.ru/aws?utm_term=skyrim+destruction+mage+build+guide PDF link annotation
    • http://azorocheat5.xyz/pokopavolurivenikazi32x1.pdfIn PDF document text
    • http://car-test.pro/pixel_knights_apkqphrw.pdfIn PDF document text
    • http://edarudost.online/kaxakalrnud.pdfIn PDF document text
    • http://ourfutures.space/millionaire_mindset_book_summaryqytb2.pdfIn PDF document text
    • http://probmake12.xyz/the_walking_dead_season_1_episode_1_castcznji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530990/normal_600db562672e6.pdfIn PDF document text
    • https://gugewixurot.weebly.com/uploads/1/3/4/3/134393699/874ad40ea93e0a.pdfIn PDF document text
    • http://sarkife.site/23283468490ip8r9.pdfIn PDF document text
    • http://stavki-na-sport.site/9409288371e47hu.pdfIn PDF document text
    • http://artdebug.site/897949004939l6as.pdfIn PDF document text
    • http://maxist.ru/subject_and_predicate_worksheet_underlining_part_1_answer_keytxez8.pdfIn PDF document text
    • http://rastet-malysh.ru/wagujurb2k9.pdfIn PDF document text
    • https://zoxiniguve.weebly.com/uploads/1/3/4/5/134584112/rupujegijazebir_fipajirokijodol.pdfIn PDF document text
    • http://zootime.store/alto_s_adventure_wingsuit_how_to_use2feme.pdfIn PDF document text
    • http://samyog.ru/12386368517xzznb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mevetilozavasep.epizy.com/81330494494.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_off00012b74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B74 5668 bytes
SHA-256: 15504abab79c405dc46ddefe240436b737ad88b1c086ac64fa614ea345317a51
font_01_sfnt_off00013eb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EB4 12024 bytes
SHA-256: fceb3091f017c4b1e7719d67a22b98bda9837d0a0d7dda0a108d11e91740e87c

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