Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc40a14f5f5f9881…

MALICIOUS

PDF

76.0 KB Created: 2021-07-14 04:39:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2639b05b7f2dd396fd458c85d173c8b7 SHA-1: 18807e91e79203d04454025cc04a573fb64a07dc SHA-256: dc40a14f5f5f988165cc5950b8e3963aa6225d4d8d39e521683e8e9bdc904ff7
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or scam attempt. The 'SE_CALLBACK_LURE' heuristic indicates the document likely contains a phone number intended to trick the user into calling for support or to resolve a fraudulent charge. While no scripts were extracted, the presence of embedded URLs and the overall detection suggest a phishing campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9680

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://feedproxy.google.com/~r/razvivatel/yapz/~3/4Ji06Fp1PxY/square?utm_term=tcap+spay+and+neuter+clinic
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e91929787dde1a90adbc22/1625889065531/11188808702.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee36a064675e3b9de0b901/1626224288437/todays_reading_in_catholic_church.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee3ef28feeeb055d9a1bca/1626226418992/66675772391.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec858ec3fb560d26f312a4/1626113423157/sports_illustrated_swimsuit_2012.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec7f235c244202458b0e57/1626111779191/powaxit.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee12eb2a4cda17625ae556/1626215148291/love_actually_bloopers.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec7ac819a16f038d617079/1626110664467/93424511539.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ece8c34bcdcf6393f752f8/1626138819979/hourglass_body_with_hip_dips.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_off0000c62e.bin
a806a28cf8bffc1f8930352676fae315c86426b517ca3629ce4d85d968ead707		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC62E 17380 bytes
font_01_sfnt_off0000f3a4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A4 16792 bytes
font_02_sfnt_off00010bbb.bin
ec0b957984840827fbef9d3980ffaf516fe14615cf7f8c899a650d4219d0fb1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BBB 10564 bytes

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