Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8e30e6c0e3673e3…

MALICIOUS

PDF

88.5 KB Created: 2021-03-14 18:25:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d1224626b1489479fe5a19bf0e680658 SHA-1: 5f732c056b03b2225e0ee7a382fd5301bf927628 SHA-256: e8e30e6c0e3673e34604ac5ee0c5c23e193f4e1249281787d4ef7f849c2bb361
156 Risk Score

Malware Insights

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

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 0.9998

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 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.
  • 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://xajibur.ru/wix?keyword=complete+guide+to+life+drawing+pdf+download PDF link annotation
    • http://zogometemo.sportsontheweb.net/types_of_processes_in_manufacturing.pdfIn PDF document text
    • https://fabisinutufonos.weebly.com/uploads/1/3/5/9/135993578/48ebd.pdfIn PDF document text
    • https://wididalinur.weebly.com/uploads/1/3/3/9/133986726/jakorereguwu.pdfIn PDF document text
    • https://bevowodawalejap.weebly.com/uploads/1/3/4/3/134363876/fbeed.pdfIn PDF document text
    • https://xasirazabad.weebly.com/uploads/1/3/4/6/134699738/6586139.pdfIn PDF document text
    • http://jekefidaz.mygamesonline.org/lost_at_school_chapter_4_summary.pdfIn PDF document text
    • https://xefinaloze.weebly.com/uploads/1/3/2/8/132814425/1df209ba1fce46.pdfIn PDF document text
    • http://zofunubesosena.mypressonline.com/the_crown_cast_season_4_prince_charles.pdfIn PDF document text
    • https://fiwebafifike.weebly.com/uploads/1/3/4/8/134885554/gupewumowusoje_nezususawa_rejexole.pdfIn PDF document text
    • https://saxipapes.weebly.com/uploads/1/3/0/7/130738636/e175fcd5b0242a9.pdfIn PDF document text
    • http://bumumapa.mypressonline.com/2011_jeep_grand_cherokee_repair_manual.pdfIn PDF document text
    • http://vutisonoj.sportsontheweb.net/the_lord_of_the_rings_book_series_in_order.pdfIn PDF document text
    • http://dabukim.mygamesonline.org/free_willy_streaming_italiano.pdfIn PDF document text
    • http://wabaxifejem.sportsontheweb.net/88461642708.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xekabotiwuker.atwebpages.com/84504041651.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/tenancy_reference_letter_template_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/numikujibotijixatiravo.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/adanga_maru_movie_kuttyweb.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/veritext_court_reporting_locations_in_florida.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/descargar_anthony_santos_en_vivo_popurri.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_off00011a0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A0B 5180 bytes
SHA-256: 48e90f52fcb577ccb6d64c37165e48bc15d8b42aa590718af099e9fcab3780ec
font_01_sfnt_off00012ba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA8 12348 bytes
SHA-256: ac3616c55197dfa4ee5bb03adb017204bfa411eaa3039236c96a72e5e3bae79c