Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeabb109d48b341f…

MALICIOUS

PDF

84.1 KB Created: 2021-07-15 20:45:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8ffcc287c1e346d842bd81d9a6a47108 SHA-1: eb1a261d3667b9274d3141909706dcbcf09fc91c SHA-256: aeabb109d48b341f3a002350e308ca2fcf793533be33fed0e13b2aa5989f3ed8
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. ClamAV and an ML classifier flagged this PDF as malicious, specifically as a phishing trojan. The embedded URL is likely used to redirect the user to a malicious site, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9627

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://inwebjor.ru/square?utm_term=broiler+daily+weight+gain+chart
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec9bda4f558d0bf39e0cd7/1626119130564/the_god_delusion_download.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec918cdef1ca41d5fa42e6/1626116493042/cnc_milling_stainless_steel.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60edd8419779423221df2851/1626200129997/nutrition_in_animals_class_7_worksheet_with_answers.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec98fdc81c37306b30a911/1626118397970/nail_shop_on_47th_and_damen.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60efecf398ba4d746116bca5/1626336499942/black_eyed_pea_broccoli_cheese_soup.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee080d02e0767984ef6ef1/1626212365640/beverivujuvupavaluzijew.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60edd42bafeffb59e670ddfd/1626199083722/89681517537.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e898200c40c50207923475/1625856032745/checking_for_battery_draw.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_off0000e5c8.bin
ddc7982ccc68e9ae4e215ea4c1a7cc8e0be5f3a05a995dbac1fd1707bb61d35b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C8 10732 bytes
font_01_sfnt_off0000fe3e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3E 16792 bytes
font_02_sfnt_off00011650.bin
53e20bcf10f2ed475bc27704445dd84511652105821346d2bc2414d231ac10a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11650 17020 bytes

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