Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f789ce8054608d3…

MALICIOUS

PDF

76.4 KB Created: 2021-04-05 01:41:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b326b52f21e9306b297e95bf2152f1f1 SHA-1: 55b029df90f5b02564e2fee651f51fa2be1d3f81 SHA-256: 2f789ce8054608d3426fc89b7c3251277a11fab39b6779b3209b370108a27bf2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://kuzutuzo.ru/wix?keyword=sims+sage+snowboard+boots PDF link annotation
    • http://bilogijagexor.22web.org/how_to_install_xm_onyx_ez_with_vehicle_kit.pdfIn PDF document text
    • https://wikuxokogex.weebly.com/uploads/1/3/1/8/131872144/6514306.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445750/normal_6056470f898b4.pdfIn PDF document text
    • https://puxajibixitukus.weebly.com/uploads/1/3/4/4/134457664/6ea8651001ec2cf.pdfIn PDF document text
    • https://liburesaxus.weebly.com/uploads/1/3/4/3/134372769/7872914.pdfIn PDF document text
    • http://kosazajodexev.22web.org/roman_catholic_history.pdfIn PDF document text
    • http://sabudunujo.22web.org/how_do_i_set_up_my_total_gym_xls.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375093/normal_6002d5373787c.pdfIn PDF document text
    • https://soxoxalumowaju.weebly.com/uploads/1/3/4/7/134768556/merizar-nufevevizesi-faxewakezilop-lelubamosi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494138/normal_5fcf0634853d6.pdfIn PDF document text
    • https://kemumapuvepuvi.weebly.com/uploads/1/3/4/3/134311950/jejaxebokiwud.pdfIn PDF document text
    • https://cdn.sqhk.co/nuwezomu/jcjciaT/dijuluputejid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380413/normal_600c3816dfc0a.pdfIn PDF document text
    • http://kigowamukidiba.iblogger.org/howard_leight_impact_sport_earmuffs_review.pdfIn PDF document text
    • http://spain50off.info/lista_de_verbos_ingles_espaol5mn0y.pdfIn PDF document text
    • http://fineagencyy.com/netgear_prosafe_jgs524pe5t9bd.pdfIn PDF document text
    • https://cdn.sqhk.co/tupizurelir/chaAbij/clinical_guidelines_for_asthma_exacerbation.pdfIn PDF document text
    • http://tixshopclub.fun/kfw_baukindergeld_antragu2bb1.pdfIn PDF document text
    • http://gatorama.fun/26537132851j4qbt.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
    • http://gizagew.epizy.com/73689102916.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/jaani_dushman_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/base64_network_error.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/winrar_for_pc_windows_7_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/44638512358.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_off0000dedc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEDC 5236 bytes
SHA-256: 0ca1a94f741295946ddfc3e51038300720a35fbad98ccdd9be0b272441da5c72
font_01_sfnt_off0000f08a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08A 10916 bytes
SHA-256: 3f8aa523e23911b16943680c9861f2195312e0e484a4463cc5654c9b80310f23
font_02_sfnt_off00011606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11606 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3