Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf991d4574dc2454…

MALICIOUS

PDF

81.1 KB Created: 2021-03-14 14:17:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: eacbb9e79170c681de1ea70f7c764ba8 SHA-1: 130ad0c1fd9897bd3eeac1a7d0c4488cc843cfff SHA-256: bf991d4574dc2454d21ffbcea7fda62587a59d08c3fe5ea1b14fe2e77c4c7df8
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 0.9990

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://ponafet.ru/wix?keyword=moral+issues+in+business+pdf+free PDF link annotation
    • http://gasurorir.sportsontheweb.net/natemakaruw.pdfIn PDF document text
    • http://zujadise.scienceontheweb.net/berliner_platz_2_neu_lehrerhandreichungen.pdfIn PDF document text
    • http://dupuladusudired.mypressonline.com/45342086079.pdfIn PDF document text
    • http://forovasax.medianewsonline.com/barriers_to_effective_communication_skills.pdfIn PDF document text
    • http://gejedesoni.getenjoyment.net/what_are_the_two_main_classifications_of_fractures.pdfIn PDF document text
    • http://zanovekolasin.mywebcommunity.org/73573420390.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405904/normal_6011ca7f58359.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421468/normal_5fe16b76e49c9.pdfIn PDF document text
    • http://ripuxojelirul.iblogger.org/fajem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404975/normal_6024fbb5e8749.pdfIn PDF document text
    • http://wutugidejavazu.scienceontheweb.net/2021833303.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://sudewepizetego.epizy.com/gunorevapose.pdfIn PDF document text
    • http://datonojafasaxup.rf.gd/pisciculture_en_bac_hors_sol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/490047bd-14e9-480b-b363-c66d2692031c/canon_printer_mg3520_connect_to_wifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/404a8967-8245-409b-b2a6-df9bdff06154/kozubebabutobovegiwix.pdfIn PDF document text
    • http://sapidobilebag.epizy.com/injury_report_patriots_vs_packers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc613df0-e1d5-4f89-b798-81d4daa981e3/wuwixokepino.pdfIn PDF document text
    • http://dovunufesesiz.onlinewebshop.net/python_gui_programming_cookbook_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/465fd4a8-0406-4254-90f2-6a30e0eadc15/lg_47ln5400_led_strip_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80918266-286d-4acc-b1f8-83a3c3730134/92076747219.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91dbc37f-10c9-44ce-b100-abbc82f4d033/11784582610.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/592c5728-2ccb-44a9-bb2c-42afeb693b7b/zelda_links_awakening_switch_walkthrough_goponga_swamp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24697d5a-920e-4374-8ad5-5733f542e3bd/minuta_de_la_reunion_en_ingles.pdfIn PDF document text
    • http://pekafujojef.onlinewebshop.net/26957126462.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa7e363e-607d-4ed9-a7fb-ea0c99942b4e/xin_vang_song.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_off0000f422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF422 4984 bytes
SHA-256: b20a5be232dffa539c890fa1c5d44dfa900b7f9be55f0bfeca0b5b1854638bb2
font_01_sfnt_off0001050f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1050F 10220 bytes
SHA-256: be08447655e43776d178d4d11f189d814f20ca83966eb211f6e15ea0b111b689
font_02_sfnt_off0001280c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1280C 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34