Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e3068f2e6928f13…

MALICIOUS

PDF

78.4 KB Created: 2021-04-20 12:00:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e1a5d73806cbd609d28629f67e7f627a SHA-1: 256874e4bdfc814c116bcb11f510002d28705559 SHA-256: 9e3068f2e6928f1335791a441ae9e6fdc506ad7055c4579e067d5baa44eb4468
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with one prominent URL pointing to a site that appears to be a lure for Diablo 3 build information. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for multiple PDF files, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://kuzutuzo.ru/strik?utm_term=diablo+3+season+22+necromancer+build+bone+spear PDF link annotation
    • http://suwadebizon.mywebcommunity.org/ballade_no_1_op_23.pdfIn PDF document text
    • http://wukosemat.22web.org/fexesalawoxel.pdfIn PDF document text
    • http://hardcreditcheck.info/how_to_read_candle_flame_magicrnfdl.pdfIn PDF document text
    • http://topvideo.design/177401390604t8cc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tunojaw.rf.gd/15470871257.pdfIn PDF document text
    • http://duziroro.myartsonline.com/advanced_excel_2020_vba_programming.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/everybody_lies_libro_en_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b05c6087-f2a9-447e-abd5-78d11a395694/tavogupogabimobakimuredo.pdfIn PDF document text
    • http://kesobikifa.epizy.com/vizikaxademikigokodejofew.pdfIn PDF document text
    • http://mituzoleti.epizy.com/tagojefemosulawebagobaga.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/29459263412.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69cbf0e4-b4f4-44ac-aa3e-defc523ef9f1/mekabusuz.pdfIn PDF document text
    • https://0ecef3a8-5193-4df1-8dcb-1b7dd0f2be2a.filesusr.com/ugd/e6092c_522b153c1c2544cbb6c5e7f13d9c85fc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f5431a0-0410-4d4d-9f2c-cc77db99f2e7/best_dog_training_app_2019.pdfIn PDF document text
    • http://xumixuwe.epizy.com/77342591142.pdfIn PDF document text
    • https://5d94d51b-2702-4b64-8df3-eadd022f3edc.filesusr.com/ugd/2ddd39_08de2045f94f43d887aec937628109af.pdf?index=trueIn PDF document text
    • https://fb4bdcd3-28a3-4206-a6c3-fb267f511c23.filesusr.com/ugd/0ad562_026905d23ba2456e8194310811f4495f.pdf?index=trueIn 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_off0000f2a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A5 5652 bytes
SHA-256: 9a814db6dd58e9b7d5e1e640c6a77a6de54a35ab5a959fb3255cb251cfdeff79
font_01_sfnt_off000105c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C2 11352 bytes
SHA-256: c442bf502daf21fd6a171c5110eb16f94fd58e3430145e3be009b29aac9cbf22

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