Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d6c202434283978…

MALICIOUS

PDF

75.4 KB Created: 2021-07-19 07:03:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8ed4e4e05c9ed2b9c2f514d066b92fc8 SHA-1: 258217e3ce6ee45b90db8a4d7391ae348723fbd6 SHA-256: 4d6c20243428397892ec776e89c9eff57664151c0d251a03139b880676eb2dce
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to redirect the user to potentially harmful content. The PDF structure itself contains duplicate objects, which can sometimes be used to obfuscate malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8872

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/~3/9xivtwLAy4k/square?utm_term=list+10+vocal+and+instrumental+music+of+classical+period
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e89afb2b2d706e8035e22b/1625856763277/47439222555.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f26c7e26e2e727c257e910/1626500222928/private_instagram_photo_viewer_apk_download.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f4e5ac6f491d4a1f035b09/1626662316222/what_does_form_mean_in_architecture.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec7b88c8b0d544b6d6d070/1626110856588/84192056377.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60edf1d37ce58f02ed95e1af/1626206675585/political_science_study_guide.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_off0000c47c.bin
b1dddce2ade0303d48fddc80c3470941d923f15c27ff2dcdf07b757f7d456b3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC47C 16832 bytes
font_01_sfnt_off0000ef4d.bin
d5a86396d928ac0fd23396dde8c01ccf1521e8efafe8d3fdecb3d93f3fce2476		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF4D 11076 bytes
font_02_sfnt_off00010929.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10929 16792 bytes

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