Malicious PDF — malware analysis report

Static analysis result for SHA-256 a29192765880e575…

MALICIOUS

PDF

73.9 KB Created: 2021-04-18 11:08:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a85fa10391f287ef6f0c48ea50b1baa0 SHA-1: 33f734a7356d41b9c7e03a03bcb3e63631eaac07 SHA-256: a29192765880e575e0077307e600f417aedebcc0d5f1b194f7cee2fb9ad1b68f
186 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 0.9960

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://crophysi.ru/strik?utm_term=honda+hrc216+mower+for+sale PDF link annotation
    • https://fukorolavo.weebly.com/uploads/1/3/4/6/134639224/suruzubotag.pdfIn PDF document text
    • https://cdn.sqhk.co/gunobawiwax/xhhh6gf/european_ice_hockey_rink_size.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/CFgdiND/wobokosomapodotiw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408879/normal_603d03dcb8c72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423136/normal_6023d746f14be.pdfIn PDF document text
    • https://wokozizexufam.weebly.com/uploads/1/3/4/2/134234926/kifogitaf_sivofabutixive.pdfIn PDF document text
    • http://barajofa.mywebcommunity.org/shimano_ultegra_di2_rd-r8050-gs_rear_derailleur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471995/normal_603f3fe0dff10.pdfIn PDF document text
    • https://tizelizenofus.weebly.com/uploads/1/3/0/7/130740364/kuwagiwa.pdfIn PDF document text
    • http://sisogelodaze.medianewsonline.com/liberalismo_en_tiempos_de_colera.pdfIn PDF document text
    • https://cdn.sqhk.co/zupuguvawaj/gfyjHFy/cowboy_bebop_netflix_cast.pdfIn PDF document text
    • https://folenepawesig.weebly.com/uploads/1/3/2/6/132680852/6086167.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501364/normal_603d1dc98c86a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380539/normal_606beb7fdb23a.pdfIn PDF document text
    • https://puwikemumej.weebly.com/uploads/1/3/1/4/131454306/raliverodiseler.pdfIn PDF document text
    • https://cdn.sqhk.co/gutinisiv/hBXdOqI/1010_block_match_puzzle_game_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/bonirixa/hjhheid/53049351208.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zipemoluligera.myartsonline.com/34143712126.pdfIn PDF document text
    • http://bipegokatif.onlinewebshop.net/18846154379.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f94ad1e7-a21d-43eb-9b96-70a90b4b3a61/dante_purgatory_canto_1_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d30bbd0-2a6f-40b5-a443-680962e7ad71/graphic_design_fonts_software_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fef6427-e709-4da0-acb2-92b6f131a3df/how_hard_is_it_to_pass_the_ap_us_history_exam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59465093-16bc-4971-8d2e-c3b95e2c4e13/precalculus_a_right_triangle_approach_3rd_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95844243-e969-4354-9894-1eb50957e805/how_to_set_time_on_tissot_touch_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87062730-afd9-4e7a-b479-c6ad3db51ca7/othello_act_1_scenes_1-3_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f30e13f2-cca5-4274-87b8-14c6f4e8e600/xigaw.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_off0000e25c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25C 5652 bytes
SHA-256: 846e795ffbdd49e4659862533143b7c250effe013d99a1c18d09488ef50245b8
font_01_sfnt_off0000f585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF585 10628 bytes
SHA-256: b8219384e74632ac903051c2c9ac942bb266cda56951843dc37c45fdb881a985