Malicious PDF — malware analysis report

Static analysis result for SHA-256 353f7939992971f0…

MALICIOUS

PDF

109.0 KB Created: 2021-03-26 08:45:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f0bf79776badce19a9e2b9765f6fc24 SHA-1: 75e4a2ef94ebf877d2d8ff0d2d1cc283a3e28a93 SHA-256: 353f7939992971f02b7a1706b00cf3b45cfbbd7af66f4391ad7de9fb94617d68
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a large number of embedded external links, characteristic of a link farm or SEO manipulation scheme. The presence of these links suggests the document's primary purpose is to redirect users to potentially harmful external sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/wix?keyword=define+ethnic+separatism+ap+human+geography
    • https://cdn.sqhk.co/zodozane/bhgibHq/father_sons_clothing_contact_number.pdf
    • http://patewukezevo.iblogger.org/fipipuzuforolemi.pdf
    • https://cdn.sqhk.co/ruwonumatag/4kreRTG/path_of_adventure_text-_based_roguelike.pdf
    • https://cdn.sqhk.co/verexoleki/jfhbgeZ/virginia_tech_men_s_basketball_head_coach.pdf
    • http://gevowavu.22web.org/jexafogusakup.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://8e0cabef-d481-4215-b437-8a5fc4e4723c.filesusr.com/ugd/f41140_bfb8a23fdee94f89b32abac5df14bb28.pdf?index=true
    • https://s3.amazonaws.com/mesixadelomomo/airdrop_macbook_to_android.pdf
    • https://c01188fd-d8af-4b86-846b-090f7ecd58d8.filesusr.com/ugd/9058e5_3bbf4a0286da46c58fe0f1b66697a4bf.pdf?index=true
    • http://vevemaj.rf.gd/bugenek.pdf
    • https://959e49da-b405-4961-97d4-5c1bb2e9a628.filesusr.com/ugd/ab0441_74358abab7c54aa7a3fc46ef8f2633c5.pdf?index=true
    • http://fozugafunu.epizy.com/atomic_structure_mcq_download.pdf
    • https://ffb80149-315c-4936-8637-e87477b606fc.filesusr.com/ugd/e7410d_700fbfac23f44d0d9f2dd7d177dbe27a.pdf?index=true
    • http://bovuzigaratufob.rf.gd/fundamental_accounting_concepts.pdf
    • http://besipopi.epizy.com/serilog_log_error_template.pdf
    • https://71347f20-8353-4153-bebc-dd2a28b3a5cf.filesusr.com/ugd/a382ee_899ff097593c4e668a6260e0e71d116f.pdf?index=true
    • https://6bfd3344-23d3-4e03-ab7d-00c1c23eecf6.filesusr.com/ugd/be19e1_ae1fe97f79ff4c39ad13aa513f251faf.pdf?index=true
    • https://91ca87c2-c493-4616-adaa-fbcec45394e1.filesusr.com/ugd/6116da_8b6e6b6ff71b4238be9387be3ec8bc05.pdf?index=true
    • https://d6504552-49b0-4b7d-b1ff-94f9e1082b83.filesusr.com/ugd/1f0558_b88f206a07524b7bbb7ced295eb64ddf.pdf?index=true
    • http://xevezowa.rf.gd/rangers_fc_ticket_information.pdf
    • https://fdb4f28e-c637-431f-967d-457feef73efb.filesusr.com/ugd/cf5aa9_aa7391a0e6cd4dbeb90956b5a9d1f705.pdf?index=true
    • https://s3.amazonaws.com/paxuvagal/bibliothcaire_formation_qubec.pdf
    • http://fuxatigapisi.epizy.com/77700398061.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001496e.bin
0dcf9f8cc1a22d84f30da082d3d3a7bdaca37e37da161a2671f88d0802f306fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1496E 5380 bytes
font_01_sfnt_off00015b96.bin
92e6c69dec80f6bd842af83c0dd1893a5d8d58c8a2087a86daf2926ab5267b0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15B96 1716 bytes
font_02_sfnt_off00016422.bin
29e3b5a44f1f69e20a8b635b41956b685d77392b60a94eef9c8d02a785465ff2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16422 16016 bytes
font_03_sfnt_off000196e7.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x196E7 4324 bytes

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