Malicious PDF — malware analysis report

Static analysis result for SHA-256 a79f07e2c43fe403…

MALICIOUS

PDF

70.4 KB Created: 2021-03-30 10:40:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7ca2888278b637042322f15723b8eccb SHA-1: 225f4bb843b3f4c6523e898ac8088aa74b2897af SHA-256: a79f07e2c43fe40391bf58f4224773ba8257b6ee0e110b0ad19e5d918911f087
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to disposable domains and one specifically identified as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

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://jumiwimov.ru/123?utm_term=beamng+drive+apk+android+oyun+club PDF link annotation
    • http://zutumufedige.getenjoyment.net/51401499135.pdfIn PDF document text
    • http://suwadebizon.mywebcommunity.org/15915478787.pdfIn PDF document text
    • http://rezltml.xyz/fugebupipobomalwwh6r.pdfIn PDF document text
    • http://mivegik.mygamesonline.org/genetics_practice_questions.pdfIn PDF document text
    • http://xuxetosufuzo.getenjoyment.net/the_vampire_diaries_cast_in_the_originals.pdfIn PDF document text
    • http://fruit-citrus.space/molevallerw.pdfIn PDF document text
    • http://raisinsapp.club/density_worksheets_with_answer_keyn2z35.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nukivamo.myartsonline.com/xodalukulolajaludekab.pdfIn PDF document text
    • https://204833c8-abda-4421-8777-5048ee7dd919.filesusr.com/ugd/e30b7a_b2a89f0074f6400eaf8b5b97934af363.pdf?index=trueIn PDF document text
    • https://da18e6a8-d720-42de-a88c-3f13daad7efb.filesusr.com/ugd/08fe48_094c7d2973da49c79a22eebcb8d7290b.pdf?index=trueIn PDF document text
    • http://lofukikusi.epizy.com/xazobebawinirev.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/katesukavozeremifosi.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/gegususivebumafe.pdfIn PDF document text
    • http://xadilopavut.myartsonline.com/medidexobigalijebil.pdfIn PDF document text
    • https://6fd4412c-3e6e-4f21-a9af-8137ffc6c0d9.filesusr.com/ugd/03469c_ce85c4e6ffde4ae7973e4ee4c4f7f1b6.pdf?index=trueIn PDF document text
    • https://9e2bb560-353e-4f5d-a08b-1363560edab4.filesusr.com/ugd/6c032c_0af68e08344149ad9d86834a91d2b2de.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zedudo/8051622087.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/dashboard_template_excel_free.pdfIn PDF document text
    • http://fizopifiluja.epizy.com/44763585612.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_off0000d32d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD32D 5632 bytes
SHA-256: a1cb26a26219054fe24fd3180ce11de70d8244858c7e14046eecbf938e503c55
font_01_sfnt_off0000e655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE655 11280 bytes
SHA-256: b6e4c1222fbf3f00a981cc4f8a7fdd4e46ddb2d18e8df0ccf30fe6299e5edd6a

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