Malicious PDF — malware analysis report

Static analysis result for SHA-256 34f507f30e1fbeaa…

MALICIOUS

PDF

78.9 KB Created: 2021-04-02 18:52:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 2c33af867d05a78df5a220f86476e435 SHA-1: bbfc35b14bc614d8d2a68187fe10e3836e93c406 SHA-256: 34f507f30e1fbeaa134901d9a1bd2cb24d537ad00d4bd739d21492da55369ad4
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=medici+masters+of+florence+ost PDF link annotation
    • https://cdn.sqhk.co/sovokeduseb/V7MZlii/infection_prevention_and_control_action_plan.pdfIn PDF document text
    • https://cdn.sqhk.co/vovoritufi/iIwiaWh/pafuwulapu.pdfIn PDF document text
    • https://cdn.sqhk.co/zesozote/zBiaNpb/silicon_valley_bank_business_login.pdfIn PDF document text
    • https://cdn.sqhk.co/gudupixure/djgkAnO/85027109324.pdfIn PDF document text
    • https://cdn.sqhk.co/bopesajan/dqxifDQ/34765483770.pdfIn PDF document text
    • http://gijasigekafafuz.iblogger.org/corpuscular_theory_of_light.pdfIn PDF document text
    • https://cdn.sqhk.co/xukigipeduve/jbChjje/official_scrabble_words.pdfIn PDF document text
    • http://biolinkus.me/loxujuzitubikogex5jhg7.pdfIn PDF document text
    • https://cdn.sqhk.co/menekilebuz/hhjbGjb/vafanufo.pdfIn PDF document text
    • http://1pokypki.website/how_to_practice_earthing7bpgh.pdfIn PDF document text
    • http://woxuruko.medianewsonline.com/tikaw.pdfIn PDF document text
    • http://lowusonuraku.mygamesonline.org/39347044339.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/11030471-5e8d-4f96-8d40-5f1506efd533/the_endless_river_best_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22dcf533-6389-46cf-bc95-56e35c99779d/88351566273.pdfIn PDF document text
    • http://dezologukow.rf.gd/nibafidodisedovegadog.pdfIn PDF document text
    • http://jupegojut.atwebpages.com/64192156473.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb368256-cc3b-4c59-833f-01d5bb2d3c61/ganukasavono.pdfIn PDF document text
    • http://fabedidatifi.onlinewebshop.net/electric_scooter_repair_san_diego.pdfIn PDF document text
    • http://ketogil.epizy.com/mathematical_models_in_biology_and_medicine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39498c02-da0d-4950-ac6b-d8a30492c399/89808946188.pdfIn PDF document text
    • http://gixufedexakav.atwebpages.com/sbi_card_statement_password.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_off0000f60e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60E 5172 bytes
SHA-256: abd942821862cd1835c41814c02240ba526bcfdec9155416b3c217a471eb6823
font_01_sfnt_off00010797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10797 12240 bytes
SHA-256: 6e82ae9e49732e75e914bda5d16892941fd4f9db2f920fa2304da8940d4e05a4

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