Malicious PDF — malware analysis report

Static analysis result for SHA-256 24aabecf165255c6…

MALICIOUS

PDF

69.8 KB Created: 2021-04-03 20:30:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 346c0b1573ce0ea96e191927f65d4513 SHA-1: e46ecd508edebcf02d86cda085d29879b53d72c4 SHA-256: 24aabecf165255c62a7db85196db4e0fb5dc13736c92ff7713bb86e7c53db65b
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous URLs point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/123?utm_term=thal+ki+bazar+video+song+free PDF link annotation
    • https://gebevomipo.weebly.com/uploads/1/3/0/7/130740462/pawagi_zizul_weziwuji.pdfIn PDF document text
    • https://xasigusuvenazuj.weebly.com/uploads/1/3/0/7/130739755/karevogokata_kovaxelisodaxu_mazakimizubosu.pdfIn PDF document text
    • https://dofikusoru.weebly.com/uploads/1/3/4/4/134472045/1465659.pdfIn PDF document text
    • http://jovaguduretup.22web.org/47166549471.pdfIn PDF document text
    • https://jukaregexiw.weebly.com/uploads/1/3/2/8/132816195/1c2804acc85.pdfIn PDF document text
    • http://zozabekevi.22web.org/pagelupovefewo.pdfIn PDF document text
    • https://fojejebub.weebly.com/uploads/1/3/4/2/134265807/runevobelidemu.pdfIn PDF document text
    • https://balevowoperat.weebly.com/uploads/1/3/1/3/131397989/5037158.pdfIn PDF document text
    • https://vuvajufuzuno.weebly.com/uploads/1/3/4/4/134480129/3818313.pdfIn PDF document text
    • https://riwivado.weebly.com/uploads/1/3/0/7/130739124/jewaranigimadibi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jizozekawa.epizy.com/add_promo_code_to_dunkin_donuts_app.pdfIn PDF document text
    • http://gifazewuki.epizy.com/astm_a53_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d6a9c06-7605-4f3e-ad46-0750558fbe5d/28433787466.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db9b221f-588b-452e-afa5-a980b747c328/obdlink_mx_bluetooth_firmware_update.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81902042-003a-4142-990d-4d89774b84b6/how_to_control_dc_motor_with_arduino_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18280a5a-4a3f-4a73-981f-cd96238c75e7/twilight_new_moon_tamil_dubbed_movie_download_tamilrockers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a299a8cc-8c16-4f55-97e7-7cf1e4f80bad/xedubusulos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4feb09e2-d6b8-4153-b5a2-69ad37fde2c0/what_are_the_basic_principles_of_interpretation_why_are_they_so_called.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d578166a-cbb5-4b87-a697-43c4a40e32a7/what_are_the_black_clergy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f1b0db1-d8ec-4f22-b836-9739c18e59c6/take_the_stairs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35117095-5c18-42f2-ad83-5f5c10183f6c/kagoxulipovusirap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47b42772-90ac-40f6-a67d-36fd3eeccbe9/ford_mustang_mach-e_rwd_interior.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20dd03a4-7b2f-4a5e-be49-a645a5fed8d4/manual_de_calidad_de_un_restaurante_ejemplo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a981e43e-bb5b-4064-b5ec-312db1cd732e/spt_dehumidifier_sd-31e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de3d1340-882c-4d29-a045-99c5b7e40c97/how_to_administer_medication_through_a_peg_tube.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_off0000d3c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C7 5432 bytes
SHA-256: 85c668fbb76e035032740cb9d8ab968796457ebb623521508dd5636b288bda3f
font_01_sfnt_off0000e646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE646 10312 bytes
SHA-256: 08b32ab0b76ad044dc60df2149bb38864180c14bf11f794604292cd3fb9fd0d6