Malicious PDF — malware analysis report

Static analysis result for SHA-256 c29728326ee80fe8…

MALICIOUS

PDF

86.8 KB Created: 2021-07-16 15:47:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a16550d66ff18ab9f4c8a8374bed05b0 SHA-1: 672526270589d831bf34901fde1cbb0286736458 SHA-256: c29728326ee80fe81fa6cdfb243475c0be908e74e2ade8e3f2575363228ad280
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 a phishing trojan. The presence of embedded URLs, although some are marked as benign, suggests an attempt to lure the user to malicious content. The file's structure and detection as a trojan indicate it is likely part of a phishing campaign, potentially using embedded scripts to facilitate the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8083

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/eoPDrVzwpx0/square?utm_term=like+water+for+chocolate+book+pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec84985f604029b991a7d2/1626113176892/stock_price_volatility_meaning.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edd1949779423221de646b/1626198420966/17023282446.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec817159713006cbe131ad/1626112369958/introducing_new_pullets_to_flock.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e94994e6bd1231e60936f9/1625901460970/miguziwarulad.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f0394fc00d13116b473a3e/1626356047564/xexiliregumunavoxi.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_off0000f114.bin
1227d0a62831d12f36cfd3f9e79ec11c31804549103ae7e8b11875400a9fe65a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF114 10720 bytes
font_01_sfnt_off000109a6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109A6 16792 bytes
font_02_sfnt_off000121b8.bin
d3753fd72543cf42115dc36147c206bc3cb57e2021802392638db0dd9b430020		 pdf-font-stream PDF embedded font (sfnt) at offset 0x121B8 17544 bytes

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