Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a9f870bb7435e4f…

MALICIOUS

PDF

70.0 KB Created: 2021-02-20 13:33:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 5e7a65e74c8e73dac7c06b5a1a8036a9 SHA-1: 5550b19d722aec4a4b0831d8d8c6b3d8bdcbb267 SHA-256: 1a9f870bb7435e4f927602ebe74802329ea96c93164978ece74ca275938a9d88
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://bologen.ru/strik?utm_term=how+to+complete+a+self+appraisal+form PDF link annotation
    • https://cdn.sqhk.co/joxesinejag/ggHjeic/mortal_kombat_11_ultimate_price.pdfIn PDF document text
    • https://cdn.sqhk.co/lefidotoxono/Sjfgfhe/download_gun_strike_free_offline_3d_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/bikolazasir/jawqid9/65908877119.pdfIn PDF document text
    • https://cdn.sqhk.co/mifodirula/idFTUj5/penguin_diner_3d_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490121/normal_60302cac7a24d.pdfIn PDF document text
    • https://cdn.sqhk.co/tofatuxurejo/iguTzic/encyclopedia_brown_reading_level.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380226/normal_5feec5d62e89f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405662/normal_600b3b18daa5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368758/normal_5fd0a19b89312.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495843/normal_60299f9f64575.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381759/normal_6013b57c73f19.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469640/normal_600264f30b15f.pdfIn PDF document text
    • https://cdn.sqhk.co/vijamabaf/jii1QtE/61259924909.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477892/normal_6009bb790c674.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/purawuma/adding_and_subtracting_integers_worksheet_grade_7.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/what_are_critical_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/95614759455.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/mechanical_energy_storage_seminar_report.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d53e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD53E 5212 bytes
SHA-256: c264b9e03e6527c6be10e4abeb9117d72843d2c1b89831a2053b7de3706deb69
font_01_sfnt_off0000e6f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F1 10532 bytes
SHA-256: 7fc9108821353400dc7b13f7e79d37a0acd36b24d6985870d89ff18ce52a1e47