Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdfe3455ac747bac…

MALICIOUS

PDF

80.4 KB Created: 2021-02-19 09:25:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 2c23c3bbcbc56ccb9e7922e2243763f7 SHA-1: 2a5b510ef0bab478660086bb1353b6e71f416d5a SHA-256: bdfe3455ac747bace40e0422e32acea78d6a3309da454b23f47fd092b706b001
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, likely intended to host a phishing page or malware. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to "Dwarf fortress lazy newb pack mac" to entice users to click the malicious link.

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://crophysi.ru/123?utm_term=dwarf+fortress+lazy+newb+pack+mac PDF link annotation
    • http://bigmagazin.xyz/nofefi9o7co.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497110/normal_60044dc87c8fe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378618/normal_5fcdac5bc441e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367667/normal_60000336d2f5e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464732/normal_5fc916a6a8e89.pdfIn PDF document text
    • https://cdn.sqhk.co/bopelara/ahjghhj/22493728358.pdfIn PDF document text
    • http://stonersfranchise.com/796448494137vvuv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389106/normal_5fce2da13cdfb.pdfIn PDF document text
    • https://cdn.sqhk.co/guzorata/ialhbih/28058792872.pdfIn PDF document text
    • http://2220202.ru/6490878467428gl2.pdfIn PDF document text
    • http://therarbooks.com/innocent_words_that_turn_her_onbo5kl.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/jef1YH4/kuvekaxipileki.pdfIn PDF document text
    • http://nukowivoxom.iblogger.org/are_microfiber_sheets_good_for_night_sweats.pdfIn PDF document text
    • https://cdn.sqhk.co/xijodepub/hdsRtia/new_york_traffic_cameras_time_square.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/jhicYJ8/25808149465.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tutasujal/kemudunilu.pdfIn PDF document text
    • http://todafamigetoj.rf.gd/3120742896.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/saoti_arewa_music_video.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/visit_to_a_historical_place_essay.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/junoposobelarelinuxuj.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/bupereretewanewoked.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_off0000fac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC3 5608 bytes
SHA-256: 6f21c88f2631ad1ee0664f97e530f4949eca1c60fb509051b45484b9b9e4e593
font_01_sfnt_off00010de8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE8 11160 bytes
SHA-256: 271e74c2d3232a00eca6a5678166b8716d19a7bbd9c4e9c3519fb0ce7fb0c588

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