Malicious PDF — malware analysis report

Static analysis result for SHA-256 4357afe94e411422…

MALICIOUS

PDF

113.5 KB Created: 2021-03-21 08:07:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14c0b08e4a86a1977ec4936d69a8a35c SHA-1: 1f8957b221d537801ffa5982405b466ae18074b5 SHA-256: 4357afe94e4114228f418fc980003a136e48481ce64fd3619cbbb234afba1edf
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used for phishing or distributing further malware. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to potentially harmful sites, masquerading as an annual report.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9880

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-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://botokaw.ru/123?utm_term=yamana+gold+annual+report
    • https://cdn.sqhk.co/lojeliju/hhhiwgj/mageli.pdf
    • http://fumuponi.22web.org/wiluvesexakazosonixo.pdf
    • https://gaxopekel.weebly.com/uploads/1/3/0/9/130969853/1720285.pdf
    • https://cdn.sqhk.co/kafufojugure/jcNMDXp/xbox_game_streaming_preview.pdf
    • https://netigobulon.weebly.com/uploads/1/3/4/0/134096742/mekajupudasufe.pdf
    • https://lijupumo.weebly.com/uploads/1/3/4/4/134496400/jijilumewunaxi_pujov_xudevivaro_bakak.pdf
    • https://cdn.sqhk.co/wudawagirus/0Mc49Df/sneak_thief_3d_mod.pdf
    • https://piborubaladedos.weebly.com/uploads/1/3/4/7/134764427/fabonaw-kumafonowomeme-natavuku-tumirogire.pdf
    • https://cdn.sqhk.co/kerutadit/xkhbibm/13112391773.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://e29a9437-b0a5-48a6-9afa-908397ce514a.filesusr.com/ugd/16a9c1_624edd20969d491eaaaef71676cda40c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4322ef9c-5849-4876-8474-b423143221c0/ilive_sound_bar_manual_itb066b.pdf
    • https://ce322291-b3da-4cc2-ae0f-523e25daec44.filesusr.com/ugd/4530da_bd301d1b48e843c1ab86debe20bbcaf0.pdf?index=true
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_f418847b33964b14a0c55efc6d6e4694.pdf?index=true
    • http://roworozirad.epizy.com/icps_guidelines_2016.pdf
    • https://uploads.strikinglycdn.com/files/e485988b-478a-480b-bcbc-ade5ca6271e4/how_to_replace_furnace_control_board.pdf
    • https://uploads.strikinglycdn.com/files/0bc3374f-852c-48ee-bfcc-9cf19d9cce5a/tawokelakogibegobobu.pdf
    • https://uploads.strikinglycdn.com/files/c578663e-e445-4c45-baed-5d44ae405f63/29906443134.pdf
    • https://uploads.strikinglycdn.com/files/02700637-1d74-40f2-b477-45f567a4d78c/61609540946.pdf
    • https://uploads.strikinglycdn.com/files/bd50bc80-5a43-4404-8bfa-6493ec1914c6/67766391621.pdf
    • https://5663e088-3595-439c-971a-5873693bee35.filesusr.com/ugd/e98895_dbe4239f0ada4311bbb5f94cd1f9398d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ecb2407f-5830-48bf-998e-620d774da4fc/dyson_dc44_charger_no_light.pdf
    • https://uploads.strikinglycdn.com/files/53caf3ad-951a-4882-9cc0-99617da1b527/functional_analysis_aba_form.pdf
    • https://uploads.strikinglycdn.com/files/57cd0324-0de4-4018-b4d5-93874111dfc8/90941022864.pdf
    • https://uploads.strikinglycdn.com/files/0e97c1c4-033d-44c0-848a-0edf29c6f1fc/kamumeduwititukixi.pdf
    • https://34886cf3-15ed-44db-93e8-8979dc7c4cd7.filesusr.com/ugd/ea2c45_098f5789406d45ad944d6bd86265131a.pdf?index=true
    • http://bameromaxaw.epizy.com/movogopeliji.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016e9c.bin
d94db34ba28c04ed4a3b874464cf68c486bf44bc8f3b387c8a5a05b30d522ae9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16E9C 4896 bytes
font_01_sfnt_off00017f20.bin
f7ac7bcf82e37070571296f24b70b820c1bbc260bd81cecfa37f0dce51264769		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17F20 12860 bytes
font_02_sfnt_off0001a96d.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A96D 4324 bytes

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