Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3b5239832baefe1…

MALICIOUS

PDF

74.3 KB Created: 2021-03-25 15:46:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb783c5e3a34ae8da69a17d775fff6dd SHA-1: ea3283079fa15492ebfed30bb399116155561cd9 SHA-256: d3b5239832baefe15b062793a93e6c39962aaa82b9bb73311932d5a8935b37f3
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' pointing to 'http://kazaxese.epizy.com/barron_s_regents_earth_science.pdf'. Another external URI, 'https://baarspo.ru/strik?utm_term=how+to+do+a+data+analysis+in+research', is also present. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/strik?utm_term=how+to+do+a+data+analysis+in+research
    • http://tademiz.iblogger.org/fanasinagigefonuv.pdf
    • http://jigiwikab.22web.org/82623703159.pdf
    • http://lajodibibodi.getenjoyment.net/lagipek.pdf
    • https://xuwejemeluk.weebly.com/uploads/1/3/4/3/134314543/zijakazig.pdf
    • https://jarosebat.weebly.com/uploads/1/3/4/6/134695718/madafapini.pdf
    • http://nusowutevu.getenjoyment.net/literature_review_on_public_administration.pdf
    • https://cdn.sqhk.co/vulovosovem/jPohciY/rovarejeg.pdf
    • https://nudimulax.weebly.com/uploads/1/3/6/0/136010194/d28b5572b6099c9.pdf
    • http://pixidilivutep.medianewsonline.com/class_action_research_proposal.pdf
    • http://tafakiduwav.scienceontheweb.net/migivasamomas.pdf
    • https://cdn.sqhk.co/felegabiw/jeHlMcC/knight_stronghold_maplestory_versus_chief_knights.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kazaxese.epizy.com/barron_s_regents_earth_science.pdf
    • https://uploads.strikinglycdn.com/files/b293dd83-a569-4698-88db-8a8c6813d687/how_to_dismantle_kenmore_elite_dryer.pdf
    • https://uploads.strikinglycdn.com/files/6d0536fc-bb5a-4f12-8e8f-6d6741daed1e/duromax_generator_cover.pdf
    • https://uploads.strikinglycdn.com/files/1d563ec9-626b-408c-92bf-2e981f10de7d/kenmore_elite_front_load_washer_repair.pdf
    • https://uploads.strikinglycdn.com/files/9896b4d5-5b04-4879-b47d-a10031b3650f/dlink_dir_601_firmware.pdf
    • https://uploads.strikinglycdn.com/files/8bd0fccf-2dbe-4d67-b824-587daaba2914/puxobo.pdf
    • https://uploads.strikinglycdn.com/files/9c6d3465-63f0-4660-b305-9eebb92fc3a8/dikalig.pdf
    • https://uploads.strikinglycdn.com/files/26be331d-58c1-4c82-aa20-dce8bf75596f/what_is_the_maximum_penalty_for_violation_of_the_ccta_exam.pdf
    • https://uploads.strikinglycdn.com/files/5e8e77fc-c582-4a5a-9e74-09fba45bdb1b/81290229356.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6f6.bin
fafc320fe27d3e99bbf12d9f6053344f0365e86ad10b3f36a758aa5dbe9a57af		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F6 5180 bytes
font_01_sfnt_off0000f8a1.bin
de966f822b80ed8abbe7108e81ba26f28124af3e33e1c1cbb58e5061ea233152		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A1 10296 bytes

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