Malicious PDF — malware analysis report

Static analysis result for SHA-256 682953531c81ece0…

MALICIOUS

PDF

70.0 KB Created: 2021-03-23 02:55:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b63a735c82db86b802c216019e369c1a SHA-1: 5b335acdc46e637ad9660a34ac764cb95fbc820d SHA-256: 682953531c81ece0177a3a8b92dbf93a16634685c4e2e628c06487b10eb9e021
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading a secondary malicious payload. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of external URLs and the high risk score indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://golowaki.ru/123?utm_term=powerpoint+monthly+timeline+template PDF link annotation
    • https://cdn.sqhk.co/raxedaninaso/Chghfhg/zexolugalaxar.pdfIn PDF document text
    • https://cdn.sqhk.co/naludibeg/dV51lih/nonprofit_executive_director_report_template.pdfIn PDF document text
    • http://in-step.shop/86005079162ni1j9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463559/normal_600ba8cac1158.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402951/normal_5fe0aa17bb7c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459060/normal_604e1a48c0f74.pdfIn PDF document text
    • http://twirlini.com/tuxogakebejubogirt3jah.pdfIn PDF document text
    • https://cdn.sqhk.co/pavetikedur/mjUieGi/autocad_2010_activation_crack.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423148/normal_5feea01b0a8dc.pdfIn PDF document text
    • https://cdn.sqhk.co/wejewenu/cNaibge/dc_comics_female_villain_characters.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465690/normal_60117d529e6a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411919/normal_603fc9eb8515f.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/n4whiha/crash_test_car_racing_ps4.pdfIn PDF document text
    • https://cdn.sqhk.co/gidetixi/9ighgcx/dabupexepuwavamaj.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/jVhbQgf/73625781365.pdfIn PDF document text
    • http://hookup671.site/bodoneremonokubum7hp0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383137/normal_602155f77df92.pdfIn PDF document text
    • https://cdn.sqhk.co/kowaziwaso/jBshjVi/happier_lyrics_official_music_video.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501775/normal_6041b9047185f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9cafe45-b225-4d19-9ad1-13d317fba5d8/sobipozimopugebetejeli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7c67dfd-4471-46e8-a9a0-332470026af1/29694457592.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_off0000d711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD711 5076 bytes
SHA-256: 99fcf971f32cae03ab6ea8a6b8d34b6e9616c0a841aa134db47fae49d1bcfd9a
font_01_sfnt_off0000e83d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE83D 10280 bytes
SHA-256: 3f428b9a9785b5d63ec92eb00992308de72bd7421f39d89b158324f99f1bad87

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