Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cbe6b9e22246e6f…

MALICIOUS

PDF

80.3 KB Created: 2021-05-14 12:43:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 91952d84471f08f4be4f874ef3f014f2 SHA-1: c0aa4aee5e77f3dd319010606aac26f2e7ea4f12 SHA-256: 6cbe6b9e22246e6f3f8f58db0c9a2c33e024cfdf15cbc54f8438a8a826fdebf3
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to drive traffic to potentially malicious sites. The primary URL, 'https://pelibifir.ru/strik?utm_term=how+to+remove+icloud+activation+lock', indicates a phishing or scam attempt related to iCloud activation locks. ClamAV and ML classifiers also flagged this PDF as malicious, supporting the phishing and malicious link farm detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://pelibifir.ru/strik?utm_term=how+to+remove+icloud+activation+lock PDF link annotation
    • https://wanesutilujat.weebly.com/uploads/1/3/4/8/134868149/jepoxajalok.pdfIn PDF document text
    • http://rumurel.mywebcommunity.org/sa_file_khng_in_c.pdfIn PDF document text
    • https://cdn.sqhk.co/mepapogivoma/Jjajd7R/19522595039.pdfIn PDF document text
    • http://kirudikegopoded.sportsontheweb.net/zevepolexubiwexejajetu.pdfIn PDF document text
    • https://cdn.sqhk.co/vakolitakap/vjfigic/fruit_ninja_blender_review.pdfIn PDF document text
    • https://mekiwukokoviv.weebly.com/uploads/1/3/4/8/134867966/9565262.pdfIn PDF document text
    • http://pogibofabut.getenjoyment.net/critical_appraisal_of_a_journal_article_ucl.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/4hhhngg/sport_racing_apk_data_mod.pdfIn PDF document text
    • https://ralanuda.weebly.com/uploads/1/3/0/7/130775203/4233900.pdfIn PDF document text
    • https://cdn.sqhk.co/vevajewez/cgcUjhe/hack_para_bullet_force_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/gegefemorosu/zhchhhi/10451243512.pdfIn PDF document text
    • https://cdn.sqhk.co/vekosozob/HgjBYXg/tozeluwexupodutebazun.pdfIn PDF document text
    • https://cdn.sqhk.co/pivifilogopa/oaNZLrA/marlins_park_seating_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xiniwipilanaju.atwebpages.com/principles_of_chemistry_a_molecular_approach_3rd_edition_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/18612311043.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/what_are_the_renaissance_period_music.pdfIn PDF document text
    • http://jutagejefutix.atwebpages.com/vibapupogewevugewebo.pdfIn PDF document text
    • http://pabotojixupi.atwebpages.com/botovuxezaxese.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/10447015938.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF293 4968 bytes
SHA-256: 4e531c11ca133980c6605964f7403d505e24425115983d77efc40b1d339cb695
font_01_sfnt_off00010369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10369 10100 bytes
SHA-256: e53006884dabd870e9007cee44e6bd4b319727fde062340025770c32e6a0fe45
font_02_sfnt_off000125f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125F4 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361