Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea5ce4cb9207dccc…

MALICIOUS

PDF

85.3 KB Created: 2021-03-23 07:09:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a03e7ed9dd5d31d4753d5f01a577dcd5 SHA-1: 44ef3676cf3e3871be2b08268c2e938d5ecfa922 SHA-256: ea5ce4cb9207dccce64844dad2678955a833552f06b60c6fe20e46cdcfe9019f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains an embedded URL that masquerades as a search result for a book, directing users to a suspicious domain. ClamAV and ML classifiers flagged this PDF as malicious, indicating a phishing or trojan distribution attempt. No scripts were extracted, but the presence of an external URI is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://lozipotod.ru/award?keyword=bartlett+s+book+of+quotations+pdf
    • https://cdn.sqhk.co/jawefujivi/jf9dM3U/37618536014.pdf
    • https://devonejejarib.weebly.com/uploads/1/3/4/6/134608322/54613.pdf
    • http://hightrade.club/what_does_indentation_in_python_meannutfu.pdf
    • https://rilawexiretik.weebly.com/uploads/1/3/4/2/134267086/piwuwutiliduw.pdf
    • https://riregagofowa.weebly.com/uploads/1/3/1/3/131379776/4550440.pdf
    • https://cdn.sqhk.co/lazimafuxuxi/QNghxjh/golden_boot_premier_league_odds.pdf
    • https://cdn.sqhk.co/vutazekerubu/PhdEibl/super_slow_motion_samsung_a50.pdf
    • https://godobinoka.weebly.com/uploads/1/3/0/8/130815080/vuvemozag_pigikega.pdf
    • http://meetsalle.xyz/dolutetagogamajaliby5jjm.pdf
    • http://helplnstagramcontact6088757.com/95341693247d0m2p.pdf
    • https://cdn.sqhk.co/rekosiseweno/igf5Kie/fipigagasasikedo.pdf
    • https://cdn.sqhk.co/demejapad/f3icnji/swing_state_polls_2016_and_2020.pdf
    • https://turabebusaweni.weebly.com/uploads/1/3/1/4/131438207/wizijizizaw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://31c8a3d4-0132-49f1-a04f-09c79d03e01f.filesusr.com/ugd/a4da84_5c11fab8c0f14c83b4f8a1cc7d25e532.pdf?index=true
    • https://s3.amazonaws.com/pusori/kagikiwiwuwopapavemogof.pdf
    • https://s3.amazonaws.com/nonipesikiri/butyl_formate_synthesis.pdf
    • https://c83cbd6e-a134-4b49-ba12-49f24c654ad9.filesusr.com/ugd/904a8b_2b08b1cb356b45298c0121dc9f112414.pdf?index=true
    • https://s3.amazonaws.com/lepefi/bajirao_mastani_telugu_hd_movie.pdf
    • https://3f9320ff-391d-49df-b192-c557e211a93c.filesusr.com/ugd/469aea_566566ca14614c44b9ccfcb408dd93c5.pdf?index=true
    • https://s3.amazonaws.com/ninasivol/does_the_lifestraw_work_on_salt_water.pdf
    • https://s3.amazonaws.com/desenaz/kininit.pdf
    • https://ba3a7bb5-edd2-4228-b29c-cf272df6a868.filesusr.com/ugd/bd1c09_24ad3ba9156d46a597b5bea508699be8.pdf?index=true
    • 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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffb5.bin
995b8d256d2bed74c8f4aec9fc8db5210e9f26e48bd0fd3999fafa0a87e0651b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB5 5296 bytes
font_01_sfnt_off000111be.bin
520ff701bc236717eb889b6d54f17ec6520872a219342c1bab9ec2972f34a1c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111BE 11076 bytes
font_02_sfnt_off0001378d.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1378D 4324 bytes

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