Malicious PDF — malware analysis report

Static analysis result for SHA-256 260dcb5397ec053a…

MALICIOUS

PDF

82.5 KB Created: 2021-03-30 05:17:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 3641b754ed6aeb2380e763bb51d0c8da SHA-1: 25803ba7c3525f4a86205540a569a01bfc0ce793 SHA-256: 260dcb5397ec053ad0e9347ef677bf7b790547cac66b1e56aa307daa6b8c058c
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 of which point to disposable hosting and are used in a link farm for SEO purposes. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically a phishing or malware distribution campaign. While no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://zajinet.ru/strik?utm_term=singer+201k+sewing+machine PDF link annotation
    • http://newser.site/pesanogesesek8nfrv.pdfIn PDF document text
    • https://kifewaremavej.weebly.com/uploads/1/3/1/6/131606874/sexut_xotuvuguji.pdfIn PDF document text
    • http://pilagapub.iblogger.org/cuentos_de_robots_para_nios.pdfIn PDF document text
    • https://vaxidavuk.weebly.com/uploads/1/3/4/3/134371973/2143658.pdfIn PDF document text
    • http://zeropium.com/guide_d_entretien_st2su8xmz.pdfIn PDF document text
    • https://rikusinifo.weebly.com/uploads/1/3/4/0/134017093/fukelizegujur-kebimusufowag.pdfIn PDF document text
    • https://pogunokele.weebly.com/uploads/1/3/0/7/130739789/3084232.pdfIn PDF document text
    • https://fafixujanubaza.weebly.com/uploads/1/3/4/0/134096145/rivexinomoxe.pdfIn PDF document text
    • https://suzoniku.weebly.com/uploads/1/3/4/4/134456843/727a8d535.pdfIn PDF document text
    • http://zirosax.iblogger.org/canara_bank_current_account_form.pdfIn PDF document text
    • https://jukawowirorab.weebly.com/uploads/1/3/4/6/134662443/5c545e99ca2881d.pdfIn PDF document text
    • https://kobuvedubi.weebly.com/uploads/1/3/4/0/134017802/4b11e70c.pdfIn PDF document text
    • http://astrohelp.space/employee_experience_journey_mapping_templatef67lt.pdfIn PDF document text
    • https://jezipupokegem.weebly.com/uploads/1/3/4/0/134042816/6892823.pdfIn PDF document text
    • https://dizakevusarebiz.weebly.com/uploads/1/3/4/5/134581037/gafasavevag.pdfIn PDF document text
    • http://dalkomis.website/carbon_dioxide_co2_has_what_type_of_intermolecular_forceswhykf.pdfIn PDF document text
    • http://biolinkus.me/19904266415axqx0.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
    • https://uploads.strikinglycdn.com/files/4930ca0f-b1e4-4cd3-a733-62104212968c/gopro_4_silver_wont_connect_to_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18a3d2dd-2b83-4173-bc98-9c532d7acbaf/how_much_to_repair_samsung_tv_screen.pdfIn PDF document text
    • http://selanas.rf.gd/army_recruiter_training_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e117829-7811-48b9-bcd0-97b85e1ae6d5/name_the_vampire_diaries_characters_quiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1da7b5af-75ce-4c7c-82c5-b248465bcbd6/nikon_d3500_vs_d5300_quora.pdfIn PDF document text
    • http://gixojur.epizy.com/read_the_tattooist_of_auschwitz.pdfIn PDF document text
    • http://kexafobe.rf.gd/math_crossword_with_answers.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_off0000f6d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D8 5364 bytes
SHA-256: 1416b96b786cac9108bdd26111bce58acfae022fe3f836410191acca61e81c65
font_01_sfnt_off000108ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108EA 11152 bytes
SHA-256: 9b8db24bb5b0166e4383af44d4c95e4067841c3d7584b1ab4a970b47f517b016
font_02_sfnt_off00012e52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E52 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

Open this report in the interactive analyzer, or submit your own file for analysis.