Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7a15e786b7b4a71…

MALICIOUS

PDF

81.5 KB Created: 2021-04-04 19:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 545bea9f5dd12b99301672f2f5014a7b SHA-1: 10fed3518fd31a5cb4a3b83806711c36a37600e8 SHA-256: f7a15e786b7b4a7156dcbb2eb805ede196bab1b521393c9cba0a4c6c936db6d3
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The PDF contains a large number of external links, with one primary URL pointing to 'zajinet.ru', suggesting a phishing or malicious redirection attempt. The ML classifier also strongly indicated maliciousness.

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 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.
  • 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://zajinet.ru/strik?utm_term=workaholics+dry+guys+song PDF link annotation
    • http://fipodusot.iblogger.org/cambridge_igcse_additional_mathematics_textbook.pdfIn PDF document text
    • https://tewagolefavir.weebly.com/uploads/1/3/0/8/130814187/dakososalevo.pdfIn PDF document text
    • http://bunakevogipo.iblogger.org/18390533933.pdfIn PDF document text
    • http://raftgjgr.space/40572356331o0lo4.pdfIn PDF document text
    • http://you-bestshop.xyz/yellowstone_tv_show_season_3_episode_9t4ov2.pdfIn PDF document text
    • http://fitnesspack.net/wijofemoruzutitijml28l.pdfIn PDF document text
    • https://pogedufofow.weebly.com/uploads/1/3/4/5/134512351/5987152.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4b002d3c-a55f-42ce-816c-238f848e88a9.filesusr.com/ugd/3398cc_c352f632e5894f068e8b64d25f7f7f3c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mudurixo/ripajufezebimog.pdfIn PDF document text
    • https://d8acad56-eb9a-42d1-a06c-a695c5b02328.filesusr.com/ugd/0ad6c7_12a3c6234fe14f79a410d28c40a02fa4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nagudo/pijifepogafo.pdfIn PDF document text
    • http://feworoborisadej.epizy.com/hp_designjet_500_c7769b_driver_download.pdfIn PDF document text
    • https://f608bf75-187c-4b28-9621-af925c05c2b6.filesusr.com/ugd/05e3ad_14cbd65b0a9e460a8bd7b42b13d3d391.pdf?index=trueIn PDF document text
    • https://9334512a-4df1-45dc-8804-f0fa1d9e2a3d.filesusr.com/ugd/9466eb_a29dc8bdd0fc469e8978adc9bbcd956e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/biology_101_lab_manual.pdfIn PDF document text
    • http://jojixeme.rf.gd/breadtalk_singapore_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/audi_a3_sportback_2017_owners_manual.pdfIn PDF document text
    • https://0ac950e2-707a-4e47-8bf4-daface0ea9db.filesusr.com/ugd/356f11_057fd61767644da4b0978cd9699f50b9.pdf?index=trueIn PDF document text
    • https://36c7e617-1221-4173-b726-d5bce2878801.filesusr.com/ugd/610d21_e8cffd6b74d1492d86c02cc9fd028d66.pdf?index=trueIn PDF document text
    • https://0fc0baf9-b884-4fcd-968e-f93c0f938930.filesusr.com/ugd/68ec51_860d5abcffb241efbdfb21a475d0c8d5.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_off00010270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10270 5380 bytes
SHA-256: b0e8d9fd51c2268657abe1aa86aa3f310015758492dac8b04e81f73d30fe67f8
font_01_sfnt_off000114ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114CE 10740 bytes
SHA-256: 14034a621621aaa52984fb5213f015452ebc5a9710f4bd2281463a1ffc577c44

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