Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a7b563085077e1e…

MALICIOUS

PDF

71.1 KB Created: 2021-02-12 07:01:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 1d739b7a0e3eb49c235d3b10d186c1a4 SHA-1: 7e7292cb77a327e8d6c38d677fcebb34a64d425a SHA-256: 6a7b563085077e1e29ff2a68829f0936041a8dd497214773af3b31e135fbdc39
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/wix?keyword=the+parts+of+a+castle+worksheet+answers PDF link annotation
    • https://cdn.sqhk.co/nebemina/JIwjf7B/bitipoxazalozelijazip.pdfIn PDF document text
    • https://cdn.sqhk.co/dukapudubi/jbih6ji/nakapexopojilebukanini.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367290/normal_5fc81b2305153.pdfIn PDF document text
    • https://cdn.sqhk.co/daguvemet/iciJA2U/vexofavoruf.pdfIn PDF document text
    • https://cdn.sqhk.co/xivijela/RmfheNN/dictionary_of_obscure_sorrows_sonder.pdfIn PDF document text
    • https://cdn.sqhk.co/sigidezok/jchb6hf/communism_symbol_png.pdfIn PDF document text
    • https://cdn.sqhk.co/sorubajuzoxe/jiBpgeD/guided_reading_levels_for_first_grade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389353/normal_601d37660e297.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/sewamos/canopy_queen_platform_bed_with_storage.pdfIn PDF document text
    • http://sebipukavore.epizy.com/bsf_apply_online_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/17356461628.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/can_i_backup_android_to_icloud.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_off0000dbcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCD 5208 bytes
SHA-256: 72b7cd17e0392605fdd97f7b86ec05cce5bdcc28182fc82e548ea279db5580e3
font_01_sfnt_off0000ed91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED91 10084 bytes
SHA-256: 5c2bcc8ad449480811ac7289dd29953ac3532537e97d7fcda49da5db1aed1169