Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d5cdd091801aef1…

MALICIOUS

PDF

79.9 KB Created: 2021-03-29 13:48:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba1c919e2ce34bd825893bc128c25543 SHA-1: d5134c899b71993672eb92fdf55c37353948dd6a SHA-256: 4d5cdd091801aef1666d3fc19209a9ebd35633902966348312460a3fe11ec55f
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URL that directs users to a suspicious domain, likely to deliver a secondary payload or phish for credentials. The document body, though heavily obfuscated, appears to be a lure related to a book title, consistent with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://maypoin.ru/wix?keyword=courage+the+joy+of+living+dangerously+pdf
    • http://lekujajivuvire.iblogger.org/kajuxisegafaziloruwu.pdf
    • http://goodxday.xyz/panasonic_phone_number_customer_servicefd658.pdf
    • http://lnstagram-verificationbadgeform.com/feleniraxmkj.pdf
    • http://xamawigokoke.mygamesonline.org/how_do_i_connect_my_hp_deskjet_2620_printer_to_wifi.pdf
    • http://modezewop.mygamesonline.org/yamaha_tdr_125_service_manual.pdf
    • http://zumbayuliya.online/dash_diet_eating_planu3b14.pdf
    • http://zdsshop.top/56921801811dqsk6.pdf
    • http://filuniguwol.22web.org/29203151719.pdf
    • http://jomikifu.medianewsonline.com/wufid.pdf
    • http://knitfqph.site/tositoselopazapadajezomocm592.pdf
    • http://wegoluxetas.scienceontheweb.net/67428978730.pdf
    • http://momarivido.mypressonline.com/what_to_know_about_marketing_management.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://refowinevog.rf.gd/77059518737.pdf
    • https://368051e9-4199-40ea-b9a2-dc6e6f83cb3b.filesusr.com/ugd/6260fe_9940fee580b944bcb14b513c9253397c.pdf?index=true
    • http://genuxemesusirif.rf.gd/lexus_sc300_transmission_fluid_type.pdf
    • https://uploads.strikinglycdn.com/files/f7531091-f863-492b-9c9d-3a9d71ebc5d4/xumifowor.pdf
    • https://uploads.strikinglycdn.com/files/07c9dd56-c012-4335-b111-38692785502a/94249860636.pdf
    • https://uploads.strikinglycdn.com/files/c75ccab7-9a9d-4330-ab32-29bf6409cca9/71709677128.pdf
    • https://b00f38ea-0d13-4519-ab0f-1253f0d03ca0.filesusr.com/ugd/289c5e_6871b6f346264d13a03a6616ed70955f.pdf?index=true
    • http://bupuboteba.epizy.com/94304016119.pdf
    • http://mobosefevexaxep.rf.gd/why_is_my_electric_oven_not_heating_up_properly.pdf
    • http://ravizovagusemav.epizy.com/abceso_hepatico.pdf
    • http://vogopulototav.epizy.com/zedaxiperatedu.pdf
    • http://danijikuguwidak.rf.gd/metal_texture_psd.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f55c.bin
2389baac95aa50784515772bc82a6092dbf955a45477230658af88aa1eab1efc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF55C 5444 bytes
font_01_sfnt_off000107f6.bin
908f8b9cde5425dac721830cb690871bf74e1accc8808fe6e09ad0601d210eca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107F6 15108 bytes

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