Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4e082304dd0de22…

MALICIOUS

PDF

89.4 KB Created: 2021-03-18 07:13:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 507bb949765a264de5a6aef6e318544c SHA-1: ee674f3391680c466349bd56756e9dba90451e6e SHA-256: c4e082304dd0de22bf0918be472554e1d8a3f593660dcfd47913ea4fda5336e0
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, with one suspicious URL pointing to vilenefex.ru, suggesting a link farm or redirection to a malicious site. The document body, though heavily obfuscated, contains keywords related to 'real estate wholesaling bible pdf free', likely a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/strik?utm_term=real+estate+wholesaling+bible+pdf+free
    • http://dorulezebum.sportsontheweb.net/probability_and_statistics_textbook_slader.pdf
    • http://wabiferofuvud.mygamesonline.org/python_2.7_set_methods.pdf
    • http://baxusajatos.sportsontheweb.net/company_profile_design_template.pdf
    • http://taforojujutusig.mygamesonline.org/skeeter_davis_the_end_of_the_world_lyrics_meaning.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/50d8a8da-6da9-4d4a-9200-e34b5726364c/28863864463.pdf
    • https://979cd01f-16ea-4d2c-b189-234964c95597.filesusr.com/ugd/d4c4cf_88e127529c8f4eb98dc58ac7b047feba.pdf?index=true
    • https://e5447efa-8854-4d04-834e-f0bbd7438c8b.filesusr.com/ugd/ac612b_b86e836dbe1d4f0dadb8b170657f47a6.pdf?index=true
    • https://s3.amazonaws.com/gapivegek/zitesusezivuripe.pdf
    • https://uploads.strikinglycdn.com/files/54486484-a9d3-40c0-bedf-e385370c3bdd/2007_pt_cruiser_transmission_fluid_type.pdf
    • https://uploads.strikinglycdn.com/files/f743d20e-27ae-4b7c-bba9-b4d99643e854/9427678100.pdf
    • https://s3.amazonaws.com/wowonesoribu/best_sat_subject_test_books_reddit.pdf
    • https://s3.amazonaws.com/tumasun/bafonavinez.pdf
    • https://s3.amazonaws.com/lumixi/twin_xl_platform_bed_plans.pdf
    • https://uploads.strikinglycdn.com/files/7af72c12-0e45-4b7d-9bcd-6023df75197f/6219742992.pdf
    • https://s3.amazonaws.com/bojafazes/zizamu.pdf
    • https://uploads.strikinglycdn.com/files/8c51ba33-96aa-455b-8d69-defe77d51877/xiravugejomefa.pdf
    • https://s3.amazonaws.com/rirusozo/20066234738.pdf
    • https://uploads.strikinglycdn.com/files/a8f6c8d3-df16-4bd9-8fcb-3e13a717bdb1/why_does_usps_tracking_says_return_to_sender.pdf
    • https://s3.amazonaws.com/vavapekadoliti/rugipako.pdf
    • https://75edee45-cd08-43cb-a752-0c33e5c2343f.filesusr.com/ugd/a7c173_a2cf4d6bbc6246e0a6f7a82c7d542982.pdf?index=true
    • https://s3.amazonaws.com/suxiweke/55485283426.pdf
    • https://s3.amazonaws.com/paropabaru/zutot.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011f31.bin
07dcfb501f8bda1667b3c58e2546e0bb92f021f04e01fdb6be6e25cb5a059579		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F31 5540 bytes
font_01_sfnt_off0001321a.bin
41457829844ba942fa96932e84bab001180406b2e033223134adf98e47bae10b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1321A 11300 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.