Malicious PDF — malware analysis report

Static analysis result for SHA-256 0db9a7555e0cdc37…

MALICIOUS

PDF

79.9 KB Created: 2021-01-27 01:10:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2673446c0da9803cf3fbbc433e76da0d SHA-1: 7ea5c708f730dfab8ec032b11389fb5b3436dd53 SHA-256: 0db9a7555e0cdc37f98fa07de3e4af3aa90dfcd294fd9742d54d3efc58501738
164 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, specifically indicating a phishing and payment redirection lure. The presence of embedded URLs, such as 'https://baarspo.ru/123?utm_term=fancy+pants+world+2+unblocked', suggests an attempt to redirect the user to a malicious site. The document's content, though partially corrupted, aligns with common phishing tactics by impersonating financial or invoice-related communications.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://baarspo.ru/123?utm_term=fancy+pants+world+2+unblocked
    • https://cdn.sqhk.co/nisifowisom/n9hcDJU/73177985101.pdf
    • http://lerawutevokaj.iblogger.org/xoxapinod.pdf
    • https://cdn.sqhk.co/liregagibago/Hjbujf8/tiktok_logo_gif_transparent.pdf
    • https://cdn.sqhk.co/birugafomafo/rX8ifhe/universe_sandbox_2_download.pdf
    • https://static.s123-cdn-static.com/uploads/4424025/normal_6003a555611fd.pdf
    • https://cdn.sqhk.co/wemorapi/jf0icob/lightroom_presets_for_night_portraits.pdf
    • https://static.s123-cdn-static.com/uploads/4382187/normal_5ffb31ba59adc.pdf
    • https://static.s123-cdn-static.com/uploads/4379841/normal_5ff9fc1e178eb.pdf
    • https://cdn.sqhk.co/pevelefotuve/IjR2jhu/47492886697.pdf
    • https://cdn.sqhk.co/ninasodivofi/ji4ghgh/reroll_app_custom_data.pdf
    • https://worubagazew.weebly.com/uploads/1/3/4/6/134639575/1746266.pdf
    • https://static.s123-cdn-static.com/uploads/4494648/normal_5fc5b46bef5a4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zamuriza/alienstock_news_report.pdf
    • https://s3.amazonaws.com/naxizugenabi/acet_online_application_form.pdf
    • https://s3.amazonaws.com/muvemasoxaji/95820724155.pdf
    • http://gasigigi.rf.gd/cleaning_checklist_template_for_childcare.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_off0000f9b5.bin
50031e0f1de627333b8058a02e3bc196e83a95c32678ae0ed7265aeddf72d74c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B5 5552 bytes
font_01_sfnt_off00010cbc.bin
31de27975703f82f47abda15e412895856c5eb65770be5e0ccaccf422698099c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBC 11192 bytes

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