Malicious PDF — malware analysis report

Static analysis result for SHA-256 6faefff68da71f51…

MALICIOUS

PDF

78.3 KB Created: 2021-07-20 17:08:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8df7e27c70d49c78f00172fb6b995bbd SHA-1: e1e63ff4e316d770a1aed4c368dccdc113239c12 SHA-256: 6faefff68da71f510a38db5405a61975c8dd11f06e1dc719abf0ea8deb571b49
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site. No scripts were extracted, but the presence of the malicious URL is a strong indicator of a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://philabc.ru/square?utm_term=aaa+pawn+shop
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f38551952f835132d7b8b3/1626572114021/a2_english_reading_texts.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e9267a12fb7d0b279396e8/1625892475037/296308330.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7736941361c2fc3ff81f5/1625781097333/facial_meridional_isomers.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8feb5338e9546e47c6d8/1626116075605/kopoxulizix.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e82bb11873c46ac93cd62b/1625828276269/89700671958.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f07daf879cfb2b82701328/1626373551145/81219177361.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f669f52fd42108f7411c74/1626761717428/44093398379.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f001613a4e3014a1c2ec7c/1626341729821/minecraft_server_hosting_free_tlauncher.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60efd9ab49582827e2fc0f86/1626331564006/use_of_there_was_and_there_were.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7d76897884458c9a19ca6/1625806696522/74737538641.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60efd7ce1c2a3138378cad8e/1626331086902/bryce_canyon_national_park.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_off0000d4e8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E8 16792 bytes
font_01_sfnt_off0000ecfa.bin
d879e7d731f744286daf54b21f18cc59e5ec4a6a6ddb9f13571d797801809ce8
pdf-font-stream PDF embedded font (sfnt) at offset 0xECFA 16296 bytes
font_02_sfnt_off00011751.bin
591e098d641d6a787f42bae4d50aa11f5c6890ab9362d6030b5e493ab9f2c1c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x11751 9948 bytes