Malicious PDF — malware analysis report

Static analysis result for SHA-256 b27cfe9a2ff2f342…

MALICIOUS

PDF

80.1 KB Created: 2021-03-29 01:23:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 31d3a58b025b373f2ae811d907d3fe95 SHA-1: 9d459775fea6e1df1f6227ee39cb358a104cc799 SHA-256: b27cfe9a2ff2f342f2aa0bd323fb62d7d5d5d40d91a4f2f1ec66d0a4a409dd4d
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 critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with one prominent URL pointing to a phishing domain. The PDF's structure and embedded content suggest it is part of a link farm designed to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xajibur.ru/strik?utm_term=porter+cable+brad+nailer+won%2527t+shoot+nails PDF link annotation
    • http://gomigapujasep.sportsontheweb.net/android_studio_java_tutorial.pdfIn PDF document text
    • http://sqrab.top/lepetu1c6d8.pdfIn PDF document text
    • http://goods-amzon.com/in_kind_donation_receipt_letter_templateucjfc.pdfIn PDF document text
    • http://xoxapepagaxon.mypressonline.com/40951775453.pdfIn PDF document text
    • http://e-devletodeme.net/audacity_download_windows_7_64_bitp4pfi.pdfIn PDF document text
    • http://zevewidojodot.mywebcommunity.org/70124022713.pdfIn PDF document text
    • http://xufonewujisos.scienceontheweb.net/concrete_and_abstract_nouns_worksheet_4th_grade.pdfIn PDF document text
    • https://cdn.sqhk.co/nepofigiper/ihauaoA/kamunixusez.pdfIn PDF document text
    • http://creditchecktotal.info/71852110040yliv3.pdfIn PDF document text
    • http://bigtittybella.com/powebusitemknhws.pdfIn PDF document text
    • https://cdn.sqhk.co/vasavubedo/ifH2ge0/gofewodamedemazidagalenu.pdfIn PDF document text
    • http://kuzososo.mygamesonline.org/amaron_car_battery_price_list.pdfIn PDF document text
    • http://fepaporipevari.mypressonline.com/92129294341.pdfIn PDF document text
    • http://fonixeguga.mywebcommunity.org/82636479328.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fiforeru.atwebpages.com/28529488375.pdfIn PDF document text
    • http://sudexixurijaxoz.atwebpages.com/libros_aprender_frances_gratis.pdfIn PDF document text
    • http://wotidupodugi.myartsonline.com/22620986665.pdfIn PDF document text
    • http://tiwedozesa.atwebpages.com/jisep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e70da8f-dea0-4efe-9dc0-1b31e5c8a8ae/wedinawikalibume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/903b2983-8c3a-42e4-993c-e7947fc01d16/how_much_does_a_full_time_starbucks_barista_make.pdfIn PDF document text
    • http://zogosugo.onlinewebshop.net/lunekawisofuxixamaxafari.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_off0000f8e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E0 5296 bytes
SHA-256: 8eb0b51724437dd9a1f33bed24f736436d1c9be2c9f937984a6a19839c1e5896
font_01_sfnt_off00010ae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE8 11100 bytes
SHA-256: 36b7444bc5463d812d71b2adccb521c5b0882e5b9bfd2c8cfa7999382f0ec8db

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