Malicious PDF — malware analysis report

Static analysis result for SHA-256 705d3166880d5bdb…

MALICIOUS

PDF

73.9 KB Created: 2021-03-23 09:59:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f89dcc00222aed4b769c251314f2596 SHA-1: 7528fb37c50c0c381b55c205f9bf0022eaaebe76 SHA-256: 705d3166880d5bdb1eee871c6a5e34a9262522d5dccf2a903f2e7ed8fe329315
96 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate this PDF is malicious. It contains an embedded URI pointing to a suspicious domain, likely a phishing or malware distribution site. The PDF structure itself is also flagged for duplicate object bodies, which can be used to obfuscate malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/wix?keyword=enrichment+activities+ideas
    • https://cdn-cms.f-static.net/uploads/4408475/normal_5fd6843bccd16.pdf
    • https://cdn-cms.f-static.net/uploads/4485443/normal_5fd640c442f7a.pdf
    • http://tdsevsvet.ru/what_affects_conduction_velocity_of_an_action_potentialcyfnc.pdf
    • https://cdn.sqhk.co/rabataxuvax/ibEEUkT/lejowikomof.pdf
    • https://cdn.sqhk.co/metusoteliza/ibJhCjc/bonuwaxikebojofapotune.pdf
    • https://static.s123-cdn-static.com/uploads/4470231/normal_5fedfe1e95ecb.pdf
    • http://5coupon.info/bongo_movies_2018_mp4l8cof.pdf
    • https://cdn-cms.f-static.net/uploads/4446915/normal_605262cdf3525.pdf
    • https://cdn.sqhk.co/gupuwiwi/ctjdgeP/tezosizepetebozefamirusof.pdf
    • https://cdn-cms.f-static.net/uploads/4390642/normal_5fd9da70c7013.pdf
    • https://cdn.sqhk.co/vilosezuj/icgkjd1/shipwreck_strain_allbud.pdf
    • https://cdn-cms.f-static.net/uploads/4374715/normal_5fd8f6d264df3.pdf
    • http://9gusevshop.website/64206016416xzpjn.pdf
    • https://cdn.sqhk.co/tixunadegu/ajighUX/kuserolilazivunes.pdf
    • https://static.s123-cdn-static.com/uploads/4370092/normal_60013612cf8d3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xewamejixolefaj/lawcraft_icivics_answers.pdf
    • https://s3.amazonaws.com/duzexefemosaxe/polaris_3900_parts_39-401.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_off0000e5a6.bin
00e80a75d24ba2cff90e2eea4ec7ed8545589c2f2e042ae014a956f11b72ad09		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A6 5164 bytes
font_01_sfnt_off0000f711.bin
97ac07ff60e65300f98f392eafe34b8c61abc0f360bf601099ff300adfdafbf6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF711 10484 bytes

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