Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e8c407e8f1e92af…

MALICIOUS

PDF

104.3 KB Created: 2021-06-09 21:42:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 196081aa489a15f073ec29b29cecea07 SHA-1: dcd4100952a853284936d0b836262c70a78e4ea6 SHA-256: 7e8c407e8f1e92afd280828c57443a3e584e330fb043498bc156d29dd97a6c8d
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to link farms and disposable hosting, suggesting a phishing or malicious content distribution scheme. The presence of a URL with a 'pokemon fire red origins download' term and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a phishing attempt. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://archism.ru/pbw?utm_term=pokemon+fire+red+origins+download+for+android
    • https://static.s123-cdn-static.com/uploads/4377928/normal_5fcefd8c4518d.pdf
    • https://cdn-cms.f-static.net/uploads/4374024/normal_603f5fdba540a.pdf
    • https://cdn-cms.f-static.net/uploads/4418993/normal_60bbc17c82bdc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xugilip.pbworks.com/f/how_to_reset_my_odometer.pdf
    • https://uploads.strikinglycdn.com/files/1105358e-c37a-4c06-96b5-802fdffd4193/delta_flight_attendant_salary_2020.pdf
    • http://garigor.pbworks.com/w/file/fetch/144568482/miruvelifudomanavabewunen.pdf
    • http://gebozuj.pbworks.com/w/file/fetch/144855747/19904543045.pdf
    • http://fuxedom.pbworks.com/f/28737925110.pdf
    • http://mizelabe.pbworks.com/f/wiwililojirewu.pdf
    • https://uploads.strikinglycdn.com/files/ff8545bf-1ff6-4aba-b0d2-fefb523fcb1d/gimibezemukomebok.pdf
    • https://uploads.strikinglycdn.com/files/5419670f-c87e-4af7-a7c5-bcb87b818cc3/99014443513.pdf
    • http://zopujoxobug.pbworks.com/w/file/fetch/144413997/can_you_cook_stuffed_chicken_breast_on_the_grill.pdf
    • http://pilujibos.pbworks.com/w/file/fetch/144491094/mawubeguvojonaxuluwefaf.pdf
    • http://malamojozag.pbworks.com/f/how_much_boost_can_a_6.0_powerstroke_handle.pdf
    • http://bavudexote.pbworks.com/w/file/fetch/144675645/sizuzesofebaserimol.pdf
    • http://kikipudojuzo.pbworks.com/w/file/fetch/144529494/ecuaciones_diferenciales_homogeneas_con_coeficientes_constantes_casos.pdf
    • http://ditidema.pbworks.com/f/hp_officejet_7610_print_head_price_in_india.pdf
    • http://zuvevetub.pbworks.com/w/file/fetch/144422562/las_7_claves_del_exito_de_disney_resumen_capitulo_2.pdf
    • http://risoxef.pbworks.com/f/intel_usb_3.0_extensible_host_controller_driver_windows_10_dell.pdf
    • http://zekodunu.pbworks.com/f/report_card_comments_for_shy_students.pdf
    • http://dadidijaze.pbworks.com/f/87690539859.pdf
    • http://vibevekofano.pbworks.com/f/40875750952.pdf
    • http://wiwedano.pbworks.com/f/maytag_bravos_xl_repair_parts.pdf
    • http://zusemivak.pbworks.com/f/pepoxivulonezu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001542e.bin
81dd1ff6a44bd77a50a54c8ed32223a0b7ca3584737dcffbfa4fe1c6742c1921		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1542E 5384 bytes
font_01_sfnt_off00016685.bin
dd0522ca130623fabf5422442472594f3860f2044e0ba1a3c135716740dd6a9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16685 13448 bytes

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