Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b0a960d12f09641…

MALICIOUS

PDF

90.8 KB Created: 2021-07-13 09:48:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dc19d2196301cb49812bef42f4145a8f SHA-1: 78092938e706c6b123d1bc77792aed7615c91167 SHA-256: 7b0a960d12f0964149a09565fcbf4e2dc4757c73f1742d637f04652a4895b664
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan delivery attempt. The presence of embedded URLs, though many are marked benign, suggests an attempt to redirect the user. The PDF structure itself contains duplicate objects, which can be used to obfuscate malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8172

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://feedproxy.google.com/~r/sq/ugae/~3/IdU8rIDf9lQ/square?utm_term=old+time+string+band+music
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ed0f12dacdbe35d625af04/1626148626654/witricity_free_download.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec831aad4a1a22a3e74c4a/1626112794567/pinoy_big_brother_otso_full_episodes.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8f3390a287971af980be6/1625879353430/financial_plan_for_catering_business.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec8efe1cff58014d549c5a/1626115838366/56301273940.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e93752025aa46e30d381c7/1625896786773/xonipikiduruxipivoridibif.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100d0.bin
f9d91f61546468c411ee8f09e44fd33f726bbdd68c023be894388f98ef7aad60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100D0 10856 bytes
font_01_sfnt_off000119ae.bin
fc73073073c8fd987170f5e4eb02189bb6e98949da4033d72e369aba8a16f1b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119AE 17704 bytes
font_02_sfnt_off00014762.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14762 16792 bytes

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