Malicious PDF — malware analysis report

Static analysis result for SHA-256 aecc1713106e9374…

MALICIOUS

PDF

78.0 KB Created: 2021-03-05 14:27:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: b0816010aaafd0210910a3f493a7031e SHA-1: c7af00de69b7df94ec994f3f206d98b572665a0e SHA-256: aecc1713106e9374bfa6e08c74b86ca9f93632dded505b84caa2bee13b5baf78
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to a "real book", which is likely a pretext to encourage clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/strik?utm_term=blue+bossa+real+book PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4415936/normal_6004119ddc5c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490140/normal_603538fc6fb26.pdfIn PDF document text
    • https://cdn.sqhk.co/wofazexej/wjeAjfX/truck_simulator_usa_download_uptodown.pdfIn PDF document text
    • http://com-signto6.xyz/house_flipper_xbox_one_review54tsg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500887/normal_602df61ed594e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368998/normal_5ff6098f8ec34.pdfIn PDF document text
    • http://pagebake.com/backup_android_apps_es_file_explorern87jm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475997/normal_602200186f98f.pdfIn PDF document text
    • https://cdn.sqhk.co/divojimo/jjgckAt/color_direct_thermal_label_printer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379491/normal_5fe0aa0b4acd4.pdfIn PDF document text
    • http://amin-ukraine.net/refopoo8wop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471723/normal_5fc83e09c2203.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490365/normal_5fc834534e94c.pdfIn PDF document text
    • https://cdn.sqhk.co/suwajipufo/i50jdB2/cat_simulator_kitty_craft_free_online.pdfIn PDF document text
    • https://cdn.sqhk.co/tejilunuf/e1ijge0/banco_do_brasil_em_miami_telefone.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3e89588a-5a83-402b-ac4e-443e27772b9b.filesusr.com/ugd/cbe325_aca0dd66f5b14f6194ece1fa46a63753.pdf?index=trueIn PDF document text
    • https://493f174a-a540-412c-bacb-e5b7b26cbfcf.filesusr.com/ugd/95bb70_d2e4086b8d1c4b86b879e429db30cbdf.pdf?index=trueIn PDF document text
    • https://d05b2b94-0af3-401c-a6ef-75d00d0b58ae.filesusr.com/ugd/3bca44_e08eb36033634bea843048a9247b10f0.pdf?index=trueIn PDF document text
    • https://93bb5028-8b17-4c47-8ab9-f46a024b0e86.filesusr.com/ugd/041612_e632037ed6204e48896279fc7ae0ada7.pdf?index=trueIn PDF document text
    • https://b5c4f4dd-ae1f-4f6a-908c-f463551224e4.filesusr.com/ugd/dafd60_ff6e442eedd140adac78406e843749f1.pdf?index=trueIn 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_off0000f588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF588 4932 bytes
SHA-256: 006272d2f78a751c1df9010ce35d8360257089aef218cef5a541a6a520085cc8
font_01_sfnt_off0001065b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065B 10724 bytes
SHA-256: 7778bc4daefd42b2a7d8e38a06b086c3dda6c5f0dcab4aab0492c8d192af536f

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