Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2e530f83b88fb4e…

MALICIOUS

PDF

77.0 KB Created: 2021-03-14 12:09:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c101033ceeb26941ca8425afec37d5d9 SHA-1: bccb9d898e722bb8c74b5ca1acb6c22cdadec7ec SHA-256: c2e530f83b88fb4eeed85bd8c2836957932297bf71808b1c9d0e0fdb0196dced
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The heuristic 'SE_PAYMENT_REDIRECT_LURE' indicates the document content is designed to mimic financial transaction instructions, a common phishing tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://golowaki.ru/strik?utm_term=harry+potter+wand+quiz+pottermore+playbuzz PDF link annotation
    • https://cdn.sqhk.co/govonesed/iigiJhf/94139659208.pdfIn PDF document text
    • https://cdn.sqhk.co/sonorizeluwi/ifhdUhi/fishing_games_online_casino.pdfIn PDF document text
    • https://cdn.sqhk.co/vibifexode/jhgfKhg/94552206173.pdfIn PDF document text
    • https://cdn.sqhk.co/podiwilur/p7Ahegf/starlink_launch_schedule_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/zenetofuma/hahejfp/the_legacy_golf_course_phoenix_arizona.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/Eljaibm/kadidisivita.pdfIn PDF document text
    • https://cdn.sqhk.co/vivakawibaki/hhhaUxP/best_ant_hill_poison.pdfIn PDF document text
    • https://cdn.sqhk.co/vizefejij/ejj3EZ2/wupegafidixomabupuguv.pdfIn PDF document text
    • https://cdn.sqhk.co/digubamot/ihgjqhc/startup_plan_wpengine.pdfIn PDF document text
    • https://cdn.sqhk.co/jesisuvov/dibieEu/short_paragraph_on_save_the_planet_earth.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/pregnancy_exercise_heart_rate_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/sph_da120_manual.pdfIn PDF document text
    • http://teditobu.rf.gd/71368143604.pdfIn PDF document text
    • https://ed0f7819-48b4-4c0d-9119-93de03d81b9c.filesusr.com/ugd/e481ce_c6582eb63cd14cb1bc3f54c6cca2c9cc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/why_is_my_frigidaire_dishwasher_not_filling_with_water.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/assembler_des_logiciel_gratuit.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/vosoxogewuzelajavigugi.pdfIn PDF document text
    • http://lulevewutowa.epizy.com/aashiqui_3_movie_bollywood.pdfIn PDF document text
    • http://fodevixitawedur.epizy.com/wizards_and_warriors_nes_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/liszt_la_campanella_music_sheet.pdfIn PDF document text
    • http://kuwoguki.epizy.com/13847055641.pdfIn PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_ddf1475d4bb844eca224394b3686fa31.pdf?index=trueIn PDF document text
    • https://fa90eb46-aa9b-4fd1-a2e8-e903ec8e50a4.filesusr.com/ugd/575fb0_14b87e2d4b5a4708a552266d58f883b7.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_off0000ee02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE02 5396 bytes
SHA-256: 52b3aa91ca6962ee29a54bef33378ad41892f4c92e937443a1ec0f7a9e3cef18
font_01_sfnt_off0001005a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005A 11188 bytes
SHA-256: 37d97e477441791bba4d95f514b65abb3e8c3be5a6e4827de54337de9660d010