Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ffbc09e423d6c30…

MALICIOUS

PDF

80.6 KB Created: 2021-04-02 00:07:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9457742520c3751bc10a37984a206870 SHA-1: 79ee8e57bb887d4d962d66abbbfa5ddbba23472d SHA-256: 4ffbc09e423d6c302744dc5211d20db29f7243c9dd52855706d78b3b89305590
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, mezovuduw.ru, which is likely used to host a phishing page or a second-stage payload. The document body, though truncated, suggests a lure related to a book summary, aligning with common phishing tactics. No scripts were extracted, but the presence of external URIs indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/wix?keyword=miss+peregrine%2527s+home+for+peculiar+book+short+summary
    • http://white-x.fun/rilenz93z3.pdf
    • http://afracheat8.xyz/sun_mere_humsafar_female_mp3_downloadrxct1.pdf
    • http://lnstagramcopyrightservices.org/20004498689i9nwj.pdf
    • http://qqkaxes.xyz/dermatology_acne_treatment_guidelinesbtj17.pdf
    • https://kejazomunago.weebly.com/uploads/1/3/0/7/130776678/daf0b1cd6173f.pdf
    • https://cdn-cms.f-static.net/uploads/4418984/normal_604b6623514ca.pdf
    • http://setofexperience.site/27063888694v21ou.pdf
    • http://bigmagazin.xyz/ravubasafilevunini77k71.pdf
    • https://cdn-cms.f-static.net/uploads/4409238/normal_60552c29b6e5a.pdf
    • https://cdn-cms.f-static.net/uploads/4391047/normal_5fe6458c8d0ad.pdf
    • https://lerasakob.weebly.com/uploads/1/3/2/6/132682990/widixatikifex-zonavaj-morajonaro.pdf
    • http://senteber.site/lagu_barong_family_yellow_clawwfy24.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://52aa71f3-9574-4e96-898b-bb16aa893b2c.filesusr.com/ugd/b13a71_58fa52faef87454fa384665655c0d994.pdf?index=true
    • https://s3.amazonaws.com/dovulavavo/67517646990.pdf
    • https://s3.amazonaws.com/viboxikuz/95795814695.pdf
    • https://f7f2eb1f-4ce6-40bf-b337-6bcc2c9c1a95.filesusr.com/ugd/dc6899_ff12e8c2fdc441218f6d6ef8653785a5.pdf?index=true
    • https://f499a9ea-5579-4d3c-a180-ba191067f9b7.filesusr.com/ugd/34ec99_4b0d3034b8ed4ebe8623e2398a735638.pdf?index=true
    • https://0c2a7d7b-be9d-4ef2-a94c-09ca905cc17d.filesusr.com/ugd/7d21c0_6f3dbfc9f64a4ec6ab4f67d53028fc09.pdf?index=true
    • https://s3.amazonaws.com/nutanigonu/udi_u818a_troubleshooting.pdf
    • https://s3.amazonaws.com/libusamagowuvo/stone_soup_cottage_restaurant.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb77.bin
9cb07c08dafa7d7d143c01bc53b1b0493a72a6f43f094352eb5a80407010f5f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB77 5656 bytes
font_01_sfnt_off0000fe9d.bin
79bbb046725734a6510b3c189407a42b72806f650a47e4903a2420b588f5a1f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9D 11780 bytes
font_02_sfnt_off000126a7.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126A7 4324 bytes

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