Malicious PDF — malware analysis report

Static analysis result for SHA-256 afc2b4cd51c38c24…

MALICIOUS

PDF

84.3 KB Created: 2021-03-30 18:03:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1c8201ccc84c69967f51690f8074e92e SHA-1: f26ac81b838e5e7d050aa8d54e530e6e198fcd96 SHA-256: afc2b4cd51c38c24a853cc02c7f281454b50398f7d2cd0e8e892a42c42227528
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic point towards an attempt to manipulate search engine results or direct users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/strik?utm_term=what+kind+of+oil+does+a+92+honda+accord+take PDF link annotation
    • https://cdn.sqhk.co/fugovigul/idQ3dhc/18971432067.pdfIn PDF document text
    • https://cdn.sqhk.co/bajowekununa/eYAiihd/dont_touch_my_phone_muggle_wallpaper.pdfIn PDF document text
    • https://cdn.sqhk.co/wokinuge/uijjcGl/sonic_riders_zero_gravity_android_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/bipufawawi/ZcdYRia/47017387419.pdfIn PDF document text
    • http://egosikenclub.com/linixuraxedasodarudosudm0fk.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/hiwk4hi/30158079038.pdfIn PDF document text
    • https://cdn.sqhk.co/mevazasid/hijgjhm/nafenejib.pdfIn PDF document text
    • http://ita-women.space/daddy_s_goodnight_kiss_guide9kf3r.pdfIn PDF document text
    • https://cdn.sqhk.co/xipuzotekela/im8icjc/forwarded_call_notification_apk.pdfIn PDF document text
    • http://marketitaly.info/50661413302p9b8c.pdfIn PDF document text
    • https://cdn.sqhk.co/lepowabog/9jehbir/are_early_90s_basketball_cards_worth_anything.pdfIn PDF document text
    • https://cdn.sqhk.co/besogevipadi/egeAie5/ultimate_wolf_simulator_apk_1._2.pdfIn PDF document text
    • https://cdn.sqhk.co/sigidezok/Widjfgw/nepubidugotipimuzugasa.pdfIn PDF document text
    • http://obmenkalnr.online/bolas_de_navidad_para_pintar_y_recortara6l4u.pdfIn PDF document text
    • https://cdn.sqhk.co/pilimisoduk/eGK3Ehf/truck_driver_city_crush_mod_apk_android_1.pdfIn PDF document text
    • https://cdn.sqhk.co/xugiwatokax/giSVOHE/litamowe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://29474179-7c7c-44ae-84e0-3c37792f2e25.filesusr.com/ugd/7f817d_9e2fb182d9dd4c7c8defc54d1df7b530.pdf?index=trueIn PDF document text
    • https://8994dc82-3839-475c-8de5-8afaa5c13229.filesusr.com/ugd/798b5e_49733cb2c9af4f72b44d668821f776bb.pdf?index=trueIn PDF document text
    • http://purumurik.epizy.com/sosidosamupibigof.pdfIn PDF document text
    • https://5c817321-7c0c-448b-959d-deb1da9fd788.filesusr.com/ugd/19103d_fbd07dfac9be440f83a1a5aab6a0f38d.pdf?index=trueIn PDF document text
    • http://jopiwutipav.epizy.com/s_b_cold_air_intake_performance.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_off0000fd0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0B 5260 bytes
SHA-256: e4a0b66e30f871ab86f0032e3d66d331df2dd872f0d18c845f89fe57e1964022
font_01_sfnt_off00010ee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE9 11292 bytes
SHA-256: a39d9dccbd3af94e4b0f0a1406148f0f179dac87b6930868ca64008608fbfe38
font_02_sfnt_off00013561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13561 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378