Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca596ba46c9ee418…

MALICIOUS

PDF

77.0 KB Created: 2021-04-12 17:08:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: c3c8efb888a81156016cdc7bd2528449 SHA-1: 2e5a82bde3e86673fe6351243754ddf2d23d0994 SHA-256: ca596ba46c9ee4182acceed1818930b6fadec1c47a1da0240fe6fe8f099546a7
126 Risk Score

Malware Insights

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

The PDF file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users. The document body, though heavily obfuscated, appears to be a lure for downloading drivers, which is a common tactic for distributing malware. No scripts were extracted, but the PDF structure and embedded URIs are indicative of a phishing or malware distribution attempt.

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://ponafet.ru/strik?utm_term=saitek+x52+pro+driver+download PDF link annotation
    • http://9gusevshop.space/263654416039kfd6.pdfIn PDF document text
    • http://vodizurulenega.mypressonline.com/a_level_computer_science_ocr_textbook.pdfIn PDF document text
    • http://smallita.space/63365677350gt1tm.pdfIn PDF document text
    • http://czecheducation.space/sirovajoxetutomekopoxenuogp24.pdfIn PDF document text
    • http://duzegotola.medianewsonline.com/20237682707.pdfIn PDF document text
    • http://prizinsta.info/can_you_tell_me_a_little_bit_about_yourself_answerzk7ry.pdfIn PDF document text
    • http://visunuduxat.mypressonline.com/wivirezisuvojagufufogoje.pdfIn PDF document text
    • http://teatr-art.com/wuterexojixoqq4vy.pdfIn PDF document text
    • http://dekoriribazovax.mywebcommunity.org/composicin_corporal_definicin.pdfIn PDF document text
    • http://merovew.xyz/dogubiwuvufigexamejemaluwpv.pdfIn PDF document text
    • http://belplitka.ru/kof_98_um_ol_charactersxautc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3bdcf48-3069-47b4-9757-d1a8a2702a23/nuwigufobuwop.pdfIn PDF document text
    • https://3dcfbd4a-ef33-49dc-a04a-0aaf5307c30d.filesusr.com/ugd/b47706_9a7a0400455a44ddaa6a2e983bd2afad.pdf?index=trueIn PDF document text
    • https://dbba0f06-1911-40f0-8c80-a2638c7f81cc.filesusr.com/ugd/b13fd1_19a234b07cae4bd5bbc1f7f92dd7e84b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pojikovewijeja/xiloxelupivonixazozap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1e22c69-cb53-44f0-8fbe-5f3ba0258a15/romeo_juliet_movie_audio_songs_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/jebajebikine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e33809a-3b36-47ea-92ec-552903ab8767/wokipupukotor.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/79174490657.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_off0000ed29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED29 5416 bytes
SHA-256: 082c1126f38b167d8e8618456982d23f92c61a93dbbc2bd4e188ef5ae625046f
font_01_sfnt_off0000ffc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC2 11836 bytes
SHA-256: 88dc9339f53ec6a5c1dbbbce67bbde647eb41badb72d2085aba9c14ad0de334d

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