Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d03f653a455b253…

MALICIOUS

PDF

82.7 KB Created: 2021-03-19 23:44:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0062910d23c816f593a7163a50b761f0 SHA-1: 77fa0fcfa337d3a57852aadb9743b190e9e0dabc SHA-256: 7d03f653a455b253d6474924e5be6d1e0845ef70ce67ab28039e5b8a594ab698
96 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a URL that appears to be a lure for downloading further malicious content. The document body, though heavily obfuscated, contains text related to 'the challenger sale' and the wkhtmltopdf application, suggesting a phishing or social engineering pretext.

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/wix?keyword=the+challenger+sale+pdf
    • http://1xbet-registrat.site/good_vs_bad_story_ideasgfs92.pdf
    • http://lofoporubatul.mygamesonline.org/wimegitoruwe.pdf
    • https://xuzumuja.weebly.com/uploads/1/3/1/6/131636792/zalarizejog-patimili.pdf
    • https://xoxomedeze.weebly.com/uploads/1/3/5/3/135308121/028b2f8e744a4c5.pdf
    • http://fuckfrsky.com/183186229348jl2b.pdf
    • http://vash-komfort5.ru/manual_blood_pressure_cuff_sizeso8dsx.pdf
    • https://vawosikajoj.weebly.com/uploads/1/3/1/4/131438279/juzizufato-fabataketilude.pdf
    • http://dosaxixapaxa.medianewsonline.com/sezamupojegegof.pdf
    • http://fortuneo.biz/is_watching_movie_streams_illegaluo7bx.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://wisixanupa.rf.gd/whirlpool_cabrio_platinum_washer_sd_code_fix.pdf
    • https://uploads.strikinglycdn.com/files/8acaeb7c-cf1e-4fb4-9af8-97f64d5d9908/hornady_140_gmx_6.5_creedmoor_load_data.pdf
    • https://uploads.strikinglycdn.com/files/c4147c17-44d0-4d4d-9065-d020e3d2f322/how_long_do_fleas_live_without_water.pdf
    • http://rabelinowizufe.myartsonline.com/hidrocarburos_alcanos_alquenos_alquinos.pdf
    • http://pexarazeju.rf.gd/buckle_up_for_safety_song.pdf
    • http://vekisofekibote.myartsonline.com/asumsi_apbn_2020.pdf
    • https://uploads.strikinglycdn.com/files/2590b507-c2a5-46a5-bea5-f7290e74555a/wosuvoxebunoposuruma.pdf
    • https://uploads.strikinglycdn.com/files/57809cfa-df6a-4a7d-b3a4-7f74ce0624f2/zubiwagozakizil.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f44a.bin
90cb10a6a593e46dd3a3a925b8ae980aff90898ba143cf1c833b89b306a8a302
pdf-font-stream PDF embedded font (sfnt) at offset 0xF44A 4916 bytes
font_01_sfnt_off000104e8.bin
9976236d6f272bead7481fa50fcb34164bcd02feaf3db261d1b442344782e82b
pdf-font-stream PDF embedded font (sfnt) at offset 0x104E8 12196 bytes
font_02_sfnt_off00012e7d.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E7D 4324 bytes