Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ce8ba9dd1227795…

MALICIOUS

PDF

74.9 KB Created: 2021-03-21 11:20:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a9c50a470e95be0dd6ccbdf4d8c0ee2e SHA-1: aad92cc92f42be2033927152c097cc2a466341cd SHA-256: 3ce8ba9dd12277953895b34dfeb0aaabd17b20c5e53fd73ebe5dde3fb7da1030
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The PDF structure and embedded content, though heavily obfuscated, are consistent with attempts to redirect users to malicious sites 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://jacksth.ru/award?keyword=theories+and+techniques+of+counseling+corey+pdf PDF link annotation
    • http://pakekoramiduwin.getenjoyment.net/al_anon_12_steps_explained.pdfIn PDF document text
    • http://kekijojovif.sportsontheweb.net/32438421502.pdfIn PDF document text
    • http://lenuvivureropi.scienceontheweb.net/mean_range_mode_median_worksheets.pdfIn PDF document text
    • http://gimarokonul.22web.org/pdf_converter_to_word_arabic_support_free.pdfIn PDF document text
    • http://winovigamaj.mygamesonline.org/rig_veda_sandhyavandanam_kannada.pdfIn PDF document text
    • http://wozupabalaviv.medianewsonline.com/tuwudilom.pdfIn PDF document text
    • http://pazifelurup.medianewsonline.com/61173117691.pdfIn PDF document text
    • http://zomoxoxuriw.mypressonline.com/wasaxizakubug.pdfIn PDF document text
    • http://pugorot.mygamesonline.org/pigixerubufifugekepuxinof.pdfIn PDF document text
    • http://gujolumurufeso.iblogger.org/kkfit_bulking_program_free.pdfIn PDF document text
    • http://xofitazuregokud.mywebcommunity.org/zodikojubilaz.pdfIn PDF document text
    • http://kujamemapevubu.mypressonline.com/plants_worksheets_for_grade_3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/63546937-7d8a-41bf-94e0-a0378decd818/chicago_electric_generator_800_watt_manual.pdfIn PDF document text
    • http://wegamaluperetuj.atwebpages.com/33504507873.pdfIn PDF document text
    • http://goxafebo.myartsonline.com/kizewilavajuzesekogakagom.pdfIn PDF document text
    • http://matiwusaned.rf.gd/finisopigulukefife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69d7e52a-e7fd-4962-adeb-ae384f90fa6c/wixafavesokerogozimala.pdfIn PDF document text
    • http://funazowo.rf.gd/pifidazuvojixuwaxuzanufun.pdfIn PDF document text
    • http://tuxefunuzire.atwebpages.com/tugurasodi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db5bddbb-3f0a-4deb-8d78-cdb92e2c4325/14028777546.pdfIn PDF document text
    • http://vimiromomekex.epizy.com/theological_and_cardinal_virtues.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D0 5476 bytes
SHA-256: 75261d707414b6e41783ff1e5804c6d9f87a9a438cd3265badb775d3a64af8b1
font_01_sfnt_off0000e864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE864 11072 bytes
SHA-256: d454a9916ead8283dd5da72967601ee93e3fc8c1df2230898a5d2e0ca03cb4bd
font_02_sfnt_off00010e18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E18 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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