Malicious PDF — malware analysis report

Static analysis result for SHA-256 31f05bd81d065ede…

MALICIOUS

PDF

75.4 KB Created: 2021-03-29 01:04:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee51ace2f7765c830165be64f6a891ec SHA-1: 77aada89e7828c4d6f18355dda21a18a0da3e86c SHA-256: 31f05bd81d065ede148b66e838d2a14d0458d81cadb97f8c293cb10bdc8abca3
96 Risk Score

Malware Insights

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

The PDF document contains a link that, when clicked, leads to a URL designed to appear as a search result. This is a common phishing tactic to trick users into visiting malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the download of a second-stage payload via the embedded URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/wix?keyword=ithaca+town+court+phone+number
    • http://arenda-comp.space/46518800673vkf28.pdf
    • http://complect-tech.ru/gemunixuvotezogorutzuftr.pdf
    • https://cdn.sqhk.co/polopomoset/hgmwDHG/sobusurig.pdf
    • https://cdn.sqhk.co/xakelafu/yWhhyie/pewupig.pdf
    • https://cdn.sqhk.co/rajemaramiw/1gi2ihS/xikaruxalipoparavupol.pdf
    • http://tozofuji.scienceontheweb.net/what_are_3_similarities_between_dna_and_rna.pdf
    • http://gimemuwet.mypressonline.com/46283018778.pdf
    • https://cdn.sqhk.co/zipirevofu/gPifDgi/virtual_villagers_origins_2_cheats.pdf
    • https://cdn-cms.f-static.net/uploads/4369781/normal_5fd7d638f3313.pdf
    • https://cdn.sqhk.co/xumupojamax/0ugcgjf/web_designing_freelance_website.pdf
    • https://cdn-cms.f-static.net/uploads/4404108/normal_601297e2899ec.pdf
    • http://sixesijilolun.mywebcommunity.org/61283995342.pdf
    • https://cdn.sqhk.co/gixobujikelu/YjiWgev/gaxazuwobebamasodexo.pdf
    • http://salet.store/9217986164zc8wv.pdf
    • http://vash-fasad.live/zugesuwafosilinbjd2e.pdf
    • http://sarkife.site/what_does_it_mean_when_your_printer_is_printing_blank_pageshhi83.pdf
    • https://cdn.sqhk.co/xudapurofoz/RKlTXif/xekigunewenabotomur.pdf
    • http://lirinevewafa.mypressonline.com/automatic_gear_shifting_mechanism_in_cars.pdf
    • https://static.s123-cdn-static.com/uploads/4424985/normal_5fca6eafc7955.pdf
    • https://cdn.sqhk.co/gobikazifelo/jj1chig/an_environmental_history_of_ancient_greece_and_rome.pdf
    • https://static.s123-cdn-static.com/uploads/4459328/normal_5feb410c87823.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0a9f94c9-9af2-4ec4-be39-627bd2a1a3e6/microsoft_project_2013_free_download_64_bit_for_windows_10.pdf
    • https://uploads.strikinglycdn.com/files/bd39bcdd-0ed2-4ccd-b45c-3107ca89f8fb/rockcrok_dutch_oven_microwave_recipes.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_off0000eb85.bin
27b5c03efc12e098bcd7755373a3542adaead3b4af60e566012ca16f61c46673
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB85 5132 bytes
font_01_sfnt_off0000fcdc.bin
7516844481d54c832d2ae5047c6dab89818fe3ea6eedcd5b9b60431ff2114f42
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDC 10332 bytes