Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6072c0aa36eb64d…

MALICIOUS

PDF

81.3 KB Created: 2021-07-13 20:38:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4486610a78d92acdfbdc3d6dfceb6c17 SHA-1: 5c958dbf2e576dba95bb88d8998ea8a07ef10d76 SHA-256: d6072c0aa36eb64dbee3478d978f3c812431670b4771d97143bd986149e74f6d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The embedded URL, disguised as a service termination letter, suggests a phishing attempt to trick users into visiting a potentially harmful site. No scripts were extracted from this sample, but the presence of embedded URLs and the overall detection profile strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/~3/7R6buoffwiA/square?utm_term=sample+letter+of+termination+of+service+agreement
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed096b67dd777ebfbcb94c/1626147179283/mukudelaximogijeji.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e871388061cb7c4098ebaa/1625846072968/meaning_of_interred.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8df152c5c2f6215c59833/1625874197514/roy_goode_commercial_law.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec960711a746407a42ee14/1626117640109/muvojekenig.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec91461951226b8b8bd9f2/1626116422916/26819667697.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e7c94581ab8d1aa9de52d6/1625803078067/dumubedukavikited.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ed97551374dd6a9a62f945/1626183509356/44489998681.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edc7281c6c1a61d522a5ea/1626195753114/you_flew_too_close_to_the_sun.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e82d974aaab0286a8dfd1e/1625828759454/32798357451.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edcf1d36d51704235edf9c/1626197789643/nerabavelumepiwidabuzawe.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec946a0e7a3c5fba3efb0c/1626117226894/dunirezabam.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ecaa47831aaf5e928e0593/1626122823565/10454064944.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec9084af807f1e152666ae/1626116228561/call_of_duty_images_hd.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_off0000d989.bin
9698b540c1807be5a8ecd564475304aab2a78e8a7bc325f8fef1f5c3667e39e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD989 10964 bytes
font_01_sfnt_off0000f2f2.bin
02fdfe2f6d0af1833dbc12c07babcaca68b4a6f09559ba52b04b3874cdc23abb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F2 16684 bytes
font_02_sfnt_off00011e7f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E7F 16792 bytes

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