Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccc9f7a83c0ce70e…

MALICIOUS

PDF

85.4 KB Created: 2021-03-30 06:58:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eff9f2d9a72a9e750d4f5e120666c54a SHA-1: e0069e420bb48b3ee8fa32604a7c7fc013830100 SHA-256: ccc9f7a83c0ce70eef9e4f5d3095c5f673e7f1f1d87ad0cda150af3b16e7e427
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, with the primary malicious URL being vilenefex.ru. The document body, though heavily obfuscated, contains a question that likely serves as a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=can+i+put+a+new+battery+in+my+kindle+fire
    • http://pubofumoxo.scienceontheweb.net/bass_guitar_passing_notes.pdf
    • http://bamirajewenexo.medianewsonline.com/parabody_350_home_gym_dimensions.pdf
    • http://nevinidonet.mywebcommunity.org/53305194825.pdf
    • http://ninuxalezopo.getenjoyment.net/how_to_find_the_half_life_of_a_first_order_reaction.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sugunava.epizy.com/robert_beverly_hale_artistic_anatomy.pdf
    • https://uploads.strikinglycdn.com/files/d2ef59ee-ea0d-4ca5-9adc-11643f495ff6/37154695098.pdf
    • https://uploads.strikinglycdn.com/files/52198a09-e093-4386-a16d-6e1b1fe8066d/2954141079.pdf
    • https://uploads.strikinglycdn.com/files/cdaa757a-d4d1-4827-8632-b3bc39a423d9/what_is_the_meaning_of_the_word_computer_monitor.pdf
    • https://9df6e0af-a028-4e88-91ba-61a1b37318d5.filesusr.com/ugd/7c1f05_6d3d1c4213824a51ada09e1d94922b70.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8967bc57-ae85-4611-8163-d93eb377b215/likiwetetipukonurale.pdf
    • http://bugenerefajujus.atwebpages.com/tatubojusevofewusojeni.pdf
    • https://uploads.strikinglycdn.com/files/f3173c03-ab7a-4659-809d-358260bb4627/what_colour_goes_with_olive_green_dress.pdf
    • https://uploads.strikinglycdn.com/files/afe36a82-daa8-437c-8a13-07bbc7b6fbe6/samsung_top_freezer_ice_maker_not_working.pdf
    • http://kuwijiti.myartsonline.com/ncert_maths_textbook_class_6.pdf
    • https://fb3efafe-1b0e-41a1-9434-8bf556110c4a.filesusr.com/ugd/de5e41_7335447c48904507ac7ed2143540878e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/115953ca-d7a6-4634-b2a1-682ee05f51f6/78738284173.pdf
    • https://uploads.strikinglycdn.com/files/3f638620-9af6-4560-91fb-a630daee277b/how_to_reset_keurig_k_compact.pdf
    • http://ferumodos.epizy.com/nikubovobido.pdf
    • https://1c019786-7048-4615-837a-ae53f087c4ae.filesusr.com/ugd/8b4172_888d868da53d45ff9a89b598dfd27d48.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4a7eb1b3-2135-478f-87a1-9047bb034599/traductor_tecnico_ingles_espaol_ingenieria_online.pdf
    • http://wobalewir.epizy.com/vitalsource_to.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_off00011040.bin
b494d454cf3c32efd775e4591ceaeb1f8b7e7fb4c6dff4bf032722fcca383f48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11040 5312 bytes
font_01_sfnt_off00012250.bin
2a0ad3944a666c73b6b0ff5cd07aaff1be26b3154048456dcdcddc6fe6fd6f4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12250 11056 bytes

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