Malicious PDF — malware analysis report

Static analysis result for SHA-256 0346f0bc69ce86a0…

MALICIOUS

PDF

70.5 KB Created: 2021-02-19 22:39:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: f45e76e916c88b681e2297c860b2b89e SHA-1: e411e90d1f354a1a641d1a5ef6863731f55fd82d SHA-256: 0346f0bc69ce86a09f9e4d9e898f66f358722dd708d9b11583d955f11cdf5c16
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable domains and redirectors, suggesting a phishing or malware distribution scheme. The presence of external URI links and the 'link farm' heuristic further support this, as these are common tactics for driving traffic to malicious sites.

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://jottigo.ru/strik?utm_term=grammaire+fran%25C3%25A7aise+grevisse+en+ligne PDF link annotation
    • http://jojiluvapesoj.22web.org/beauty_salon_contract_of_employment_template.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzefegevo/hejckij/picture_colour_change_app.pdfIn PDF document text
    • http://kosodidaxelo.22web.org/lyocell_sheets_allergy.pdfIn PDF document text
    • http://svoydvalend.xyz/11254376037sqt43.pdfIn PDF document text
    • http://nizeguz.iblogger.org/72751165943.pdfIn PDF document text
    • http://rentline.pro/attached_amir_levine_download5xd4b.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/gggzHjf/hollywood_story_fashion_star.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372980/normal_5fdf8c3a81354.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388156/normal_601220fb4a985.pdfIn PDF document text
    • http://muwabiva.iblogger.org/wegaregofasafu.pdfIn PDF document text
    • http://miiliioner.xyz/luzobumuxipoz0pcwt.pdfIn PDF document text
    • http://tevuvisena.iblogger.org/wipiguvixezufawijepof.pdfIn PDF document text
    • http://bifugejif.22web.org/duvet_cover_size_guide_nz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nofegogimulat.rf.gd/nigobivibozipu.pdfIn PDF document text
    • http://tosowepexinuf.epizy.com/basic_ecg_interpretation_test_1_foundation_answers.pdfIn PDF document text
    • http://sefamuw.rf.gd/holtzman_inkblot_test.pdfIn PDF document text
    • http://tirixerunifadi.rf.gd/53233355380.pdfIn PDF document text
    • http://pewesinelukaveb.epizy.com/performance_friction_brake_pads_rotors_and_calipers.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_off0000d475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD475 5360 bytes
SHA-256: 9df0ff96338cc11cb3754c5c8d4026abc830862470e7712f439247d1f4839264
font_01_sfnt_off0000e6ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AD 11348 bytes
SHA-256: 1b220ca070d8d9043e7f286a7cb2e907c09878c059a6665d840118c5fd675e5a

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