Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c489c3eca602c0c…

MALICIOUS

PDF

83.9 KB Created: 2021-05-13 07:56:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 7bb13d619cc29f2c12ff8373b6d7226c SHA-1: ec17f5e7ecb9613efb5f26a5cdad24fb58484a77 SHA-256: 0c489c3eca602c0c74f6b429cc4d0a3df5c00e070734b87b480088abd78ee57e
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous embedded URLs, with one prominent URL directing to 'gimoguvi.ru/strik', suggesting a phishing or malicious redirection attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/strik?utm_term=will+a+carbon+monoxide+detector+detect+smoke PDF link annotation
    • http://glawerry.online/60428965355suue7.pdfIn PDF document text
    • http://lnstagramsupportingcenter.com/how_to_teach_listeningr6oys.pdfIn PDF document text
    • http://ashotik.space/d_day_in_hd_history_channelmtz76.pdfIn PDF document text
    • http://cashbackmoney.info/moto_g6_phone_user_manualqjrg2.pdfIn PDF document text
    • http://rofuxipof.mywebcommunity.org/27819344661.pdfIn PDF document text
    • http://lipibolari.iblogger.org/artritis_reumatoide_mexico.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487897/normal_5fd9d953d9d73.pdfIn PDF document text
    • http://nukowivoxom.iblogger.org/61762739593.pdfIn PDF document text
    • http://fibaxoxadomi.sportsontheweb.net/how_to_use_natural_tangents_in_log_table.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464735/normal_6057ae558dce6.pdfIn PDF document text
    • http://avit0.pro/how_many_calories_in_taco_bell_grilled_cheese_burritoly7l8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490725/normal_5ffb15648ef65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374188/normal_6066a371e0600.pdfIn PDF document text
    • http://lotemosunuw.iblogger.org/java_concepts_with_examples.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dd39d194-9042-494f-90ab-223c96cf8da5.filesusr.com/ugd/5d3909_8bc176f58835445d9d4fe87cac565a00.pdf?index=trueIn PDF document text
    • http://joxumokuri.epizy.com/79390979773.pdfIn PDF document text
    • http://rodisasedozax.myartsonline.com/how_much_is_susan_st_james_worth.pdfIn PDF document text
    • http://zaduzos.myartsonline.com/92612706204.pdfIn PDF document text
    • https://2fe0a9f4-4d23-48c4-8711-d5fb25093877.filesusr.com/ugd/683a75_fcddac76fb104840b85182648449696b.pdf?index=trueIn PDF document text
    • https://20996a60-9695-4f45-8fdb-44bdc783da55.filesusr.com/ugd/c57cae_5e0103f971bd48569429fee6d39e3bb1.pdf?index=trueIn PDF document text
    • http://tamedigozetot.epizy.com/gigebotiberiwas.pdfIn PDF document text
    • https://9f9bd9fa-00fe-4673-b34e-9a629881f524.filesusr.com/ugd/09273f_339578297ea5454cbceb1cf0fd48a2cb.pdf?index=trueIn PDF document text
    • https://2a4065d7-883d-43e8-a524-7ce9aa4b4e88.filesusr.com/ugd/ccb1c6_7992702fc97c443a93e5bea8d1c1d698.pdf?index=trueIn PDF document text
    • https://cc46d2ba-e7cf-42f8-aa62-b015a0c17ef0.filesusr.com/ugd/d180c3_ca9741f027904ba49dc5be96c71a7ece.pdf?index=trueIn 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_off0001076c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1076C 5372 bytes
SHA-256: fbc556647e2a9ffa45068999784832c005ec0d161c7284bc0f2715f71b19703a
font_01_sfnt_off000119a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A5 11256 bytes
SHA-256: 94ef07bb58fb19e3cdfa08c89b440397c69c27afc5f76a41a7fbea1679ac736d

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