Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f301ff3f3a570bb…

MALICIOUS

PDF

84.4 KB Created: 2021-03-31 10:50:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 749b3ad2fd3ee6914a18deed98c101c0 SHA-1: e99ea3785fcb7f1b43601ddb3af466510d30c020 SHA-256: 7f301ff3f3a570bb8a43cc53a512df45ee787f0c3c3a35feba2e10dc25418c77
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high ML score and ClamAV detection as a phishing trojan. The document body, though malformed, suggests a lure related to a product manual. The presence of numerous external URLs, many pointing to unknown or suspicious domains, indicates an attempt to redirect the user to malicious content or phishing sites. The PDF structure itself is also noted as a link farm on disposable hosting.

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
  • 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://vilenefex.ru/strik?utm_term=char-broil+the+big+easy+electric+tru+infrared+smoker+and+roaster+manual PDF link annotation
    • http://firstsecu-paypal.com/ir_burglar_alarm_project_report10pd4.pdfIn PDF document text
    • http://hackins.site/raminikozunotogevolinipqyncv.pdfIn PDF document text
    • http://bet-info.ru/geronimo_stilton_books_order_india7q0zo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467945/normal_6026deb57794e.pdfIn PDF document text
    • http://fakaripeti.xyz/beautiful_formal_dresses_for_ladies598h9.pdfIn PDF document text
    • http://mp4.design/trane_xl14c_reviews4e39d.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • https://cdn.sqhk.co/fokodusi/gibhdNc/biwanowunuvuviribizebi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373304/normal_6049373c5e1d3.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://cdn.sqhk.co/furafurume/haCPWdI/84217906710.pdfIn PDF document text
    • http://theraisins.pro/86326874468csrtz.pdfIn PDF document text
    • https://cdn.sqhk.co/ferorigife/O8fijcD/48984332373.pdfIn PDF document text
    • https://cdn.sqhk.co/mogudekusab/hfjchdI/dapipawajelesakunox.pdfIn PDF document text
    • https://cdn.sqhk.co/wepugozotap/hjhbjjZ/diablo_3_necromancer_pet_build_season_21.pdfIn PDF document text
    • http://rezltml.xyz/zeperilugisopirinivlxt7.pdfIn PDF document text
    • http://healthytrands.com/56504540499uxw3n.pdfIn PDF document text
    • http://levantemosaic.com/how_to_setup_brother_printer_to_print_wirelesslycdll0.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/feliso/bhu_ba_sociology_syllabus_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/moto_g5s_plus_recebera_o_android_9.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/19413394206.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_off00010bc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC6 5676 bytes
SHA-256: b67a15332f9dc6e98cc1d4b5e10e93bb9be1010b04fbd2190d7b07e1b9d8f6aa
font_01_sfnt_off00011ef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF9 10716 bytes
SHA-256: 42855214cf7b32e221d0ab0f3493fbe925c81a8059dd4553839f554d95fd00c6

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