Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc5a55581b4995cc…

MALICIOUS

PDF

76.2 KB Created: 2021-07-14 01:53:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 61d06f5dc99668474be9a01dfe01e14f SHA-1: ca001675040776850b18dcc98473054848b2069e SHA-256: cc5a55581b4995cca9dc831995e2fc28d4b947bdd7471dbae26fb1fd1dc79376
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it likely contains an exploit. The presence of a visual download button heuristic suggests a lure to trick the user into downloading a payload. The embedded URLs, though mostly benign, are part of the overall phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8715

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/X6hrLWyzjlw/square?utm_term=form+1+self+declaration+for+learning+licence+punjab
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7f02c46a8e17713e59542/1625813036918/2520509447.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ed98fbc8312e4ee1ddfe02/1626183932009/marriage_astrology_in_tamil_by_date_of_birth.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60eda4cfdfc7900eec33192d/1626186959206/92139522526.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee151f1f51426150ca16ca/1626215711747/rob_zombie_top_hits.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7b711bab0621613367749/1625798417275/41106694574.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_off0000c673.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC673 16792 bytes
font_01_sfnt_off0000de8a.bin
eb4f8d42abbb5492c2e0a24b7d81346270448c91b07fc9ef7b3ac3300e589ca0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8A 11364 bytes
font_02_sfnt_off0000f8da.bin
7a645ee715161db532601e67394e14306d8b9f40f0f714dcf2a2483ee297bbbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DA 16284 bytes

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