Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5e3ca265ddb8b58…

MALICIOUS

PDF

112.0 KB Created: 2021-04-12 15:41:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a182cb4a34ae372ed4b61cc1c79f65d4 SHA-1: 260ba3056132ae69997a7d4b1436f0ae45040880 SHA-256: f5e3ca265ddb8b58a6e9b5af458dfa99011d78c0cdbf5c3c87d827a19dd98f30
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a high probability of malicious intent. The document body, though heavily obfuscated, suggests a lure related to 'handwriting practice'. No scripts were extracted, but the presence of a malicious URL is a strong indicator of a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://zajinet.ru/strik?utm_term=daily+handwriting+practice+contemporary+cursive+pdf
    • http://zurabutodiriwa.22web.org/mifalamoxaxopemonasadodad.pdf
    • http://allrecipes.pro/mesevufirosal4df4w.pdf
    • http://jawazapefaxuzit.mywebcommunity.org/michael_swan_practical_english_usage_4th_edition_free_download.pdf
    • http://rixadixiji.scienceontheweb.net/commutative_algebra_oscar_zariski.pdf
    • http://profaudit32.ru/somimukuzowadababufixorfh2gi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://91953a53-6f32-4f2a-9b2e-0f954541ff31.filesusr.com/ugd/dad90e_65ab16e8a2ec49138b4cf74df7a9c3fe.pdf?index=true
    • http://vimozav.epizy.com/20221306777.pdf
    • https://s3.amazonaws.com/muwomapotumugi/checklist_para_diagnostico_empresarial_gratis.pdf
    • http://nabotiwufonego.epizy.com/hyponatremia_australian_guidelines.pdf
    • https://s3.amazonaws.com/zibenoroduzuw/how_to_fix_a_leaking_sprinkler_system.pdf
    • https://s3.amazonaws.com/nerugiraxura/game_awards_2020_date.pdf
    • http://sejonigimanam.epizy.com/metulimomedujoteferuje.pdf
    • http://vivefisapef.epizy.com/negixaxopifabopupen.pdf
    • http://mivowejow.rf.gd/6202896398.pdf
    • https://ede8a7a3-2377-4e09-926a-401222b31c25.filesusr.com/ugd/81c89d_926c7aaf1b3e4767b4b6a344986d989e.pdf?index=true
    • http://fobiwuna.epizy.com/39217568286.pdf
    • https://4b5f4e46-8b81-4257-bf39-61fc08ba57b0.filesusr.com/ugd/7ea8bb_7e6f58496fa14471994b31eb7860fc76.pdf?index=true
    • http://fabonejane.onlinewebshop.net/tetop.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://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e80b.bin
716d4a181a0c8d478b9a9a8ee97a95d127d0a1f986f9130f59f79a16bfbedad0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE80B 40000 bytes
font_01_sfnt_off00016068.bin
a9a407be9570f43b1dbe61b28efad6d3e4fdddd801cbab219d6ac82ec8e2bd3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16068 5824 bytes
font_02_sfnt_off0001743c.bin
d39cdcdf08680870048a6c035f366fc9ac36cf755011289310dea5235c3b08d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1743C 11884 bytes
font_03_sfnt_off00019cc8.bin
b91ebbfc40a94f10b2fcfc4d08542e4cd4fc38dcff43bcfefe5d572695fcce17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19CC8 16160 bytes

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