Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac2dd9f443d11b36…

MALICIOUS

PDF

108.5 KB Created: 2021-07-18 03:54:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b90d3b765a376431f337aab35442d7e2 SHA-1: 9a8eb35646472fbea7562a48edb6138eed3a1611 SHA-256: ac2dd9f443d11b36e5f6acdfce5dd564a4021ef3b6337b3005a4dbe7288b768e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, indicating a phishing trojan. It contains embedded URLs, suggesting a lure to external malicious content. Although no scripts were explicitly extracted, the PDF format and the nature of the detection suggest potential for embedded JavaScript or other exploit mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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/razvivatel/yapz/~3/UQ8tT55rDuk/square?utm_term=present+monarchy+countries
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee779364675e3b9de4b0fd/1626240915922/xylem_vessels_definition.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8d7580388a1034d7cff2/1626115445543/probability_questions_and_answers_grade_6.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f36a90deec581620308dc0/1626565265004/nadijanavorewok.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e90b18566ded7d61abeb75/1625885464431/21919455947.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee5fe9ab0cb8743be6c6af/1626234857936/365_days_full_movie_with_subs.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f35ba425edf123065b2354/1626561444475/wowito.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f10f6ee013e242e7133796/1626410862454/2001_chrysler_concorde_owners_manual.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f12e4578fb23041a0155bf/1626418757224/nifenenodaloja.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f09dc7ad39913da95d2ab8/1626381767436/wh_question_and_answer.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee63cedf274736e0ae0940/1626235854720/53168624653.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f0753599acec0fa46881c5/1626371381602/nakiborigakozipedugug.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f2e2922be78d526595a928/1626530450183/aimbot_for_counter_blox.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f22b79ec23251fe3c1cadc/1626483577407/blackmail_meaning_in_arabic.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f0a0093a4a34189bcff214/1626382345245/32888173128.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_off00014731.bin
96aa30bc7bd430ef23d7730e8f11d20d4a016cfecd13c4f4398e806d2129e45d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14731 10664 bytes
font_01_sfnt_off00015f85.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15F85 16792 bytes
font_02_sfnt_off00017797.bin
376f8451e1b1c7645f3f940dc7ae2b97f2c2eec1441308282885b9a04ee3be86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17797 17728 bytes

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