Malicious PDF — malware analysis report

Static analysis result for SHA-256 b78b07749dbed08d…

MALICIOUS

PDF

82.4 KB Created: 2021-05-04 06:59:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 416301a821e15584b0e80769cced5fca SHA-1: ae9ef252c6df4083d2c482bd4f669bfd2850ede0 SHA-256: b78b07749dbed08dd630349141df60277639bba589d8f3db2a073cbaa72be14b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/strik?utm_term=ghost+power+book+2+episode+6+preview PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4495395/normal_5feeef75581fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473035/normal_604366335476c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500187/normal_5ffb82cb521a7.pdfIn PDF document text
    • http://centerverifybadge.com/556035786612mpee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482629/normal_6065feac2e5c7.pdfIn PDF document text
    • http://netlysy.online/shaded_red_dachshund0j9fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378607/normal_5fc623a2d0499.pdfIn PDF document text
    • http://weraka.online/kabuvokigediwg0t8x.pdfIn PDF document text
    • http://dakujuzoma.22web.org/4_bedroom_house_plans_in_kenya.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370777/normal_603e088b1eaba.pdfIn PDF document text
    • http://safetymirrors.xyz/zunizuzusajopofanekaper88owq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://96daf755-36ed-4ece-a185-bed8db3f70ea.filesusr.com/ugd/a95cda_b6689a63b0794dbc8e19771e0ad677a7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3eaa1288-78bf-4753-abea-90455fdd1300/nemexugakipazator.pdfIn PDF document text
    • https://042e50b4-45d0-4577-915a-c14d43ab21ad.filesusr.com/ugd/18f527_01e0478f7980460f83bb7e016ad2e98f.pdf?index=trueIn PDF document text
    • https://945b3f91-9c76-4178-be32-f0dab3cfe2c6.filesusr.com/ugd/8d5d69_fb6f517b8e0a4640bd6be0877ac5a812.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaf812be-1a63-426b-b825-2c83fab27249/a_passage_to_africa_form_and_structure.pdfIn PDF document text
    • http://wotexel.rf.gd/27179433325.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6364d70-c145-4583-8cc9-84a68d467ad0/which_oil_heater_is_best_in_india.pdfIn PDF document text
    • https://997b2cc2-d96d-4654-b184-8a5d7ad473c0.filesusr.com/ugd/b8d08c_b6338f0a9e824c27853afcd8ad2beebf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fce59beb-8df4-4ccd-bcea-b9c1a553c7c4/55625571638.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18ae7c20-c692-4a10-a588-4245a8ca3828/takogudisubobamipusap.pdfIn 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_off00010091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10091 5476 bytes
SHA-256: 678e64d5e2afba615329c527be518cc9589c0c0f0523f1ef5d01b81c1c3c62df
font_01_sfnt_off00011346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11346 11664 bytes
SHA-256: da0ba3a0fd94c748ef7dd3cb2643ebaffbd28789c4efb6327cdb3adfef8157b3

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