Malicious PDF — malware analysis report

Static analysis result for SHA-256 9240b77666ac645e…

MALICIOUS

PDF

75.7 KB Created: 2021-04-06 21:33:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f8cfbe2e0c912af07450d6afd2f1164 SHA-1: db06a2dad95abdd3ddce8a2654e659d5ec7a3ae1 SHA-256: 9240b77666ac645e88d6dcc7698d207a698adc9dd3c5d4e09043393f5e8a150b
116 Risk Score

Malware Insights

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

The sample is a PDF document flagged by multiple heuristics, including a critical ClamAV detection for phishing and a medium heuristic indicating a callback phishing lure. The document body, though heavily obfuscated, contains text related to 'Eaton manual transfer switch 100 amp' and is associated with an external URI pointing to 'golowaki.ru'. This suggests the document is designed to deceive the user into believing they need to contact support or resolve a billing issue, a common tactic for phishing and social engineering scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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/wix?keyword=eaton+manual+transfer+switch+100+amp
    • https://static.s123-cdn-static.com/uploads/4413982/normal_5fce68d39dbc0.pdf
    • https://cdn-cms.f-static.net/uploads/4474997/normal_6067473d38582.pdf
    • https://cdn-cms.f-static.net/uploads/4445544/normal_5fd1208a8f0c1.pdf
    • http://reduslimitaly-official.website/40084081760i00le.pdf
    • http://natural-shop.info/lamupebubisagrpje.pdf
    • http://love-cosmetics.shop/la_siesta_del_martes_english_summaryywpsr.pdf
    • http://frontglass.xyz/870766994529rk5u.pdf
    • http://mattelipsticks.site/99527703012xgz1j.pdf
    • http://shop50off.info/3518080656981bep.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ab9d01b6-738a-4d07-bb3f-f68456a8f652/how_to_fix_a_badger_500_garbage_disposal.pdf
    • https://s3.amazonaws.com/gelawiweza/report_on_labour_force_in_singapore_2018.pdf
    • https://uploads.strikinglycdn.com/files/c1bcbcce-247e-4afc-9d9f-8e1c23286abe/what_are_the_starbucks_cup_sizes_called.pdf
    • https://s3.amazonaws.com/fotepopunaj/enzyme_catalysis_worksheet_answers.pdf
    • https://s3.amazonaws.com/vufuzewasi/lord_of_the_flies_study_questions_chapter_4.pdf
    • https://s3.amazonaws.com/jevopemosod/lumberjack_wood_splitter_reviews.pdf
    • https://s3.amazonaws.com/bopuxosavubare/formato_historia_natural_de_la_enfermedad.pdf
    • https://uploads.strikinglycdn.com/files/40bae659-c0a7-4dd8-87b0-8418e3894e4a/37758941106.pdf
    • https://s3.amazonaws.com/vajefam/equivalence_class_questions_and_answers.pdf
    • https://s3.amazonaws.com/dixaleko/4960727257.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_off0000e6de.bin
ba5130dd4ac3d29af80412674adda567375338ecde2003d4d9dde9b9fcb4981c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DE 5500 bytes
font_01_sfnt_off0000f981.bin
f5ef35811eab540bcf0f3123fa5c309bcffd145ae28ad8a456d7b8aa3b423630		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF981 11772 bytes

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