Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4a652940adf6992…

MALICIOUS

PDF

72.3 KB Created: 2021-02-28 17:49:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 0d8ded0a78380e2d2739d0cc8ace5ff7 SHA-1: f76a72cf89b733d7dcf7b71b6150ef278136feb5 SHA-256: a4a652940adf699200d3741a97e9c4e6d6ab166e497ab37d977f4eb7fcc9ee83
186 Risk Score

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://leonvi.ru/award?keyword=uscg+aeromedical+manual PDF link annotation
    • https://napuximijagebi.weebly.com/uploads/1/3/4/7/134766840/mawado-zusap.pdfIn PDF document text
    • https://cdn.sqhk.co/zelosoza/pjigcZa/unofficial_tips_for_resident_evil_3_minimalist.pdfIn PDF document text
    • http://logemopi.22web.org/chrome_addons_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/rivotoxupow/jdezhbv/crossword_puzzle_maker.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476952/normal_6008d5eaae4ed.pdfIn PDF document text
    • https://pudodogefelareb.weebly.com/uploads/1/3/1/6/131606347/52b569.pdfIn PDF document text
    • https://luvodufugatese.weebly.com/uploads/1/3/4/8/134893210/4580443.pdfIn PDF document text
    • https://berisojelo.weebly.com/uploads/1/3/0/8/130874511/vijabaza_begajiriju.pdfIn PDF document text
    • https://cdn.sqhk.co/sevigexew/ijjeFig/pocket_size_bully_for_sale.pdfIn PDF document text
    • https://venevivoxeda.weebly.com/uploads/1/3/1/8/131857756/salido.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426424/normal_5ff7c5e0b5ec4.pdfIn PDF document text
    • https://fuzakeraza.weebly.com/uploads/1/3/4/8/134848422/276f30067ad30.pdfIn PDF document text
    • http://munupozazuwo.iblogger.org/jativinoson.pdfIn PDF document text
    • https://cdn.sqhk.co/pemejurove/jihfWh9/86881250713.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/baxunaf/rose_gold_glitter_foam_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/joining_letter_after_maternity_leave_template.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/belkin_ac1750_modem_router_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/vapavotizenofubitakenilur.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_off0000d2ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2EA 3080 bytes
SHA-256: 0fcef192c95d6fd4d5333de3e5f0a04c8525a73f6e29f4febd37223f58d6e746
font_01_sfnt_off0000ddf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF3 5252 bytes
SHA-256: 550dd6a5a697f145a1f1691c45a96757784bad9c887d3328786f5cc9183d7e56
font_02_sfnt_off0000efb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB6 10836 bytes
SHA-256: 9d2716207ba52626914deca9c89569376af551c5ce1a4f09f93b4c9af4e23377

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