Malicious PDF — malware analysis report

Static analysis result for SHA-256 d40d6250cbce8350…

MALICIOUS

PDF

92.9 KB Created: 2021-03-30 14:42:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c36dff576b0e13722c5f4d91a8da4e0d SHA-1: 20e0ab8774ff321474b5b914c3c6c95d6135bf4e SHA-256: d40d6250cbce8350e2b5057e319dfdd969c85129d687b79b0ea3447de3bda7d5
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to business plans, likely to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://jumiwimov.ru/award?keyword=business+plan+pdf+food+truck
    • http://air-calm2.club/wilderness_survival_merit_badge_worksheeti8qb9.pdf
    • http://balegetiwep.mywebcommunity.org/tutorial_excel_macros.pdf
    • http://rbqjkwklnd.xyz/40256636631kd3ia.pdf
    • http://kinoxca.xyz/nebovapuxisaf7tcn6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5aab7cd3-cb49-4615-b204-853c241b0e9b/gossip_girl_the_wrong_goodbye_cast.pdf
    • http://nibubatovavav.atwebpages.com/fizira.pdf
    • https://s3.amazonaws.com/dudujopixejikug/movement_hozier_sheet_music_free.pdf
    • https://uploads.strikinglycdn.com/files/eb716d66-e47f-4285-bc3a-78878f15a207/writing_and_balancing_chemical_reactions_worksheet_answers.pdf
    • https://uploads.strikinglycdn.com/files/f7a3b71a-828a-4fcb-9989-d514e9efdb3e/how_to_connect_iphone_to_home_network_printer.pdf
    • http://rututovabin.rf.gd/bill_nye_science_video_atoms_and_molecules_worksheet_answers.pdf
    • https://uploads.strikinglycdn.com/files/90cc1891-6e7f-468b-8025-7ff694b7c1dc/how_to_track_stock_trades.pdf
    • https://s3.amazonaws.com/remuv/zuvimu.pdf
    • https://s3.amazonaws.com/kagedatabujo/97787387613.pdf
    • https://uploads.strikinglycdn.com/files/5a4870fa-c5db-494a-bf31-38c726ae9d6d/what_does_it_mean_when_maint_reqd_light_comes_on.pdf
    • http://vonupov.epizy.com/canon_eos_1200d_dslr_camera_manual.pdf
    • https://uploads.strikinglycdn.com/files/45124116-ff10-46b2-b730-4c80dba5e044/rajeki.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_off00012def.bin
2b730c157e83e29d990873f8ca3e410210b9590e70bdf9550b8b6055a1010e88
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DEF 5260 bytes
font_01_sfnt_off00013fe9.bin
7bdbdd583f36f5bacb5c5e59bddff62cc3a23f2ff7cc3fd9e834f711e1b31831
pdf-font-stream PDF embedded font (sfnt) at offset 0x13FE9 11240 bytes