Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dee3a73fb363a04…

MALICIOUS

PDF

88.3 KB Created: 2021-07-13 17:35:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 554f78cbcc0c25efd147e25fc47be396 SHA-1: c5f32a482a373cd61632c87264aa1e962ed8a9a8 SHA-256: 7dee3a73fb363a04f123addfb324e28989ba14fdc56843eb98fa61bee0c004b9
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, likely intended to trick the user into visiting a phishing or malware distribution site. No scripts were extracted, but the presence of an external URI suggests a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8440

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://coretry.ru/square?utm_term=poem+for+friendship+day
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ed80646b40a9602c97e12f/1626177636218/meaning_of_menses_in_english.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ed5e9f36a7a57c1cf26f3c/1626168991636/downton_abbey_highlands.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7dafaa3609a707bac1d42/1625807610656/pisara.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7d8d402743737595d253/1626111373448/the_bible_project_reading_plan_2020.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ed422d2ae47d2ac920b8cf/1626161709415/meaning_of_optimization_in_telugu.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec9bef7a6a1626764ade89/1626119151777/withers_horse_anatomy.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_off0000f6cd.bin
789ae5696de381e94beadd5a7c849dac8adc19ef565fdf19e4831b339a5a51b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CD 10736 bytes
font_01_sfnt_off00010f41.bin
6cc90ebcf923833381cc52042f03ece6c56374e1cd32cafbde3338e26e92e1c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F41 17092 bytes
font_02_sfnt_off00013bab.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13BAB 16792 bytes

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