Malicious PDF — malware analysis report

Static analysis result for SHA-256 407251c00e293fcd…

MALICIOUS

PDF

75.8 KB Created: 2021-06-08 03:53:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 6be7ddb73cd8f4bc45a65eceaaf9e1e4 SHA-1: ee5334da0928b62e3299d7c609f76a760d915718 SHA-256: 407251c00e293fcd0551696ea969c0853020b19e257304dcf87a28967b2917e5
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URL `https://synerhu.ru/pbw?utm_term=how+to+find+autopsy+reports` indicates a lure related to searching for specific information, likely to deceive users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://synerhu.ru/pbw?utm_term=how+to+find+autopsy+reports PDF link annotation
    • https://jikeberu.weebly.com/uploads/1/3/1/8/131857846/sarasuruxibazuzari.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416299/normal_600667a8c8a4b.pdfIn PDF document text
    • https://nekazadezi.weebly.com/uploads/1/3/4/6/134662300/pepokidotad-neliturapoxifu-kolibeke-tadobil.pdfIn PDF document text
    • https://ferakatetimof.weebly.com/uploads/1/3/4/4/134470639/4442a22.pdfIn PDF document text
    • https://xogepojofaridel.weebly.com/uploads/1/3/2/7/132741214/ed7d66.pdfIn PDF document text
    • https://kesozelakix.weebly.com/uploads/1/3/5/3/135300748/seweze_ridexulodexevum_zebesed.pdfIn PDF document text
    • https://felomogolupa.weebly.com/uploads/1/3/4/3/134345494/dugemumo.pdfIn PDF document text
    • https://tonukujile.weebly.com/uploads/1/3/1/8/131857071/vufinununarovi_naguxotadosuxid.pdfIn PDF document text
    • https://xenexaguvu.weebly.com/uploads/1/3/4/2/134265948/zegokiwuboki_makimurupob_jofapawonib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487187/normal_605c1e2f915c8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3efccb77-a4f0-4825-90bb-a322be17a752/how_to_wire_directv_dish.pdfIn PDF document text
    • http://sazupamufode.pbworks.com/f/83398839234.pdfIn PDF document text
    • http://zemenifinabe.pbworks.com/w/file/fetch/144575070/aleister_crowley_tarot_deutsch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6e63ca2-f50a-41c0-a3ff-96c66b634334/gta_san_andreas_cheats_menu_download_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27d982ef-5cdf-4559-b008-04d40eb77563/30938961018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9465927f-4703-4545-8d5c-3df3d63ab8f2/can_you_attach_car_seat_baby_jogger_city_mini_double.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7d7a9fc-fa16-4580-ab69-039607054720/whirlpool_gold_series_dishwasher_instruction_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/699ff578-eb18-46aa-93cb-486f78cf5a6e/saxon_math_course_1_cumulative_test_15a.pdfIn PDF document text
    • http://kelivesas.pbworks.com/f/kavafakidojinusekijaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1be1e18-ba15-422a-9682-2eaab987cdac/53121270676.pdfIn PDF document text
    • http://kuzimotum.pbworks.com/w/file/fetch/144538938/compendio_de_criminalistica_rafael_moreno_gonzalez.pdfIn PDF document text
    • http://ravowibosu.pbworks.com/w/file/fetch/144476991/6th_sense_technology_seminar.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_off0000eabb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABB 5160 bytes
SHA-256: 3bb38fab345c9ded7bd29fa03b938fbe121a97077aa9054b85d3b9e1cb2c74bb
font_01_sfnt_off0000fc71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC71 11080 bytes
SHA-256: 1794f78189b1755bf9960b3656ec752f6db6dfa143d44847ca73b76f55f58a00