Malicious PDF — malware analysis report

Static analysis result for SHA-256 68523910adf1d648…

MALICIOUS

PDF

78.7 KB Created: 2021-03-25 05:55:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5acd6842318492c50df94eae3f2a128 SHA-1: d593e9c9426b9c152ac0c415a813ff36906d71da SHA-256: 68523910adf1d64818f80f0e67f87ce7afd94890898bc7ed7f1f995b8b6a310f
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious intent. It contains an embedded URL pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to contain keywords related to the embedded URL, suggesting a lure to trick the user into clicking the link.

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://botokaw.ru/123?utm_term=coliform+bacteria+in+water+how+to+treat
    • http://vbnmcxz.xyz/66733617098sy1hp.pdf
    • https://gifonoxudofi.weebly.com/uploads/1/3/4/3/134322056/lasetulujirapav_reremovekat.pdf
    • http://reduslim-official.website/tchibo_cafissimo_classic_bedienungsanleitungvoljt.pdf
    • http://phulop.store/probability_addition_rule_examplesa8y7f.pdf
    • http://fisidijomufuto.22web.org/92423330181.pdf
    • https://cdn-cms.f-static.net/uploads/4371553/normal_601fad26be3c5.pdf
    • http://insuranceautousa.com/bird_song_notification_soundcbwxs.pdf
    • https://static.s123-cdn-static.com/uploads/4377933/normal_5fff72afa601f.pdf
    • https://static.s123-cdn-static.com/uploads/4368229/normal_5fcb24f73dc51.pdf
    • https://valodoxajub.weebly.com/uploads/1/3/4/4/134435871/wiwavuximobalaxex.pdf
    • http://adv-workshop.site/vert_shock_fullyqcmo.pdf
    • http://tezibif.mygamesonline.org/cutting_edge_upper_intermediate_resource_bank.pdf
    • http://rawenspant.online/womugwfnbh.pdf
    • http://prizinsta365.site/49960051575sx9sb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fexojuvaf.rf.gd/nuzolatalirorujox.pdf
    • http://budobilososuw.rf.gd/98408467451.pdf
    • http://sofibimibojas.myartsonline.com/michael_bazzell_books.pdf
    • http://voderekop.rf.gd/amadeus_flight_codes.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_off0000f2fb.bin
26861b330ba90c2ef81ce5057e7903bcbbf516be6f8db81be3bb0bf4fe0a32f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FB 5080 bytes
font_01_sfnt_off00010426.bin
b4d29a77b0517e07df38e4a2f9e08b922885df1cd274b460eb41dbc3c183079b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10426 11652 bytes

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