Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdff9c29babd1481…

MALICIOUS

PDF

85.9 KB Created: 2021-07-21 20:40:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 840cab6383b82dc60f6a0d479a31854f SHA-1: 8733d2a1b4f15551b85b539f85b3300dee149cd7 SHA-256: cdff9c29babd1481251fd3c931910ca509b0df7db123792d6e23bd3db665393e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate this PDF is malicious. It contains embedded URLs that likely lead to phishing content or further malware. The document body is heavily obfuscated and unreadable, but the presence of embedded URLs and the high confidence detection suggest a malicious intent, possibly related to credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/v-xubMviL4Y/square?utm_term=dimark+cash+and+carry
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f228f6e615ea111e5dc99e/1626482934416/can_your_water_break_and_not_have_contractions.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f0b7cf4be5f74a98d9c5c0/1626388431878/merarisokamamanoma.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7b1b038ed220952ab6282/1625797040456/wavadal.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60edbffeb0089c62dc3adbdd/1626193918414/ray_optics_questions_for_neet.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec81bffd54eb070825b009/1626112447488/lagolap.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60edd4f21f6a9512286ed28e/1626199282851/mods_for_minecraft_1.16_pe.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f7ecef6b9c6a47815b1b40/1626860784050/55855014306.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f84decee63aa1708052d38/1626885612757/safesivinolagid.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f204d9ec922002f4298559/1626473689449/tangible_employment_action.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f6d292c9b25f4ae8e2ec68/1626788498704/webazewaluzelogin.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f47b7827519501fc1df9f3/1626635128330/xezekumonitoxalaba.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f21085abd24e3ae56ed1cc/1626476677809/13040133773.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e76eb46f26a74a07f8cef3/1625779892341/vibojitazozenen.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f2afb826e2e727c259fc82/1626517433194/45860338843.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f35929bb7e64222df9009b/1626560809300/tooltip_in_react_native.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee92bf114e6b7b7deb3d47/1626247871692/upper_back_pain_that_hurts_to_breathe.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee4e400b33b63bb8c7250b/1626230336207/minecraft_best_things_to_do.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f7aa8beed4b36744468bd2/1626843787501/zodiac_signs_as_people.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee13692d09e34b729d13a0/1626215273577/ent_specialist_in_near_me.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec93f9bcf8be39b5069f92/1626117113100/assistant_teacher_interview_questions_and_answers.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_off0000ea42.bin
6f5a80ccae4e95546aec2cc7d4b84b2fd2b6f0881bd4e0ea29226c0409156ef8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA42 10448 bytes
font_01_sfnt_off000101bd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101BD 16792 bytes
font_02_sfnt_off000119cf.bin
e2b00a6ab5adc5cb01a15181213f37236abc00f3661d7df315bf2b4d53348896		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119CF 18376 bytes

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