Malicious PDF — malware analysis report

Static analysis result for SHA-256 66598d00d4de1c5d…

MALICIOUS

PDF

76.2 KB Created: 2021-03-15 02:30:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1216329a2d5f98fa986acaf61f104842 SHA-1: 2a421258fd9584712714373a2ba27cffab475dff SHA-256: 66598d00d4de1c5d619ff446abad755881b3125acfeb63170eb18db73e0557d1
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, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a malicious payload or phish for credentials. The document body, though heavily obfuscated, suggests a lure related to a PDF download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://fokemale.ru/award?keyword=el+almacen+de+las+palabras+terribles+libro+completo+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365626/normal_602abb05c8cc6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393181/normal_5fc8d7e96fc86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393759/normal_5fe7054f26cad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485454/normal_602c52c96e498.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466370/normal_602ec5aebcf46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412768/normal_5fe887ffafe27.pdfIn PDF document text
    • https://cdn.sqhk.co/futevanu/aMfhg38/mall_girl_dress_up_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420025/normal_6020d45ee4bb1.pdfIn PDF document text
    • https://cdn.sqhk.co/gixenako/cN64wjc/archery_master_3d_mod_money_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381962/normal_602b0ecc1dd83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445103/normal_604693949e42b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495262/normal_5fd8f3618e78e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408586/normal_5fee05945a442.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372355/normal_601a05505c421.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417314/normal_5fdefad6ce6b7.pdfIn PDF document text
    • https://cdn.sqhk.co/zebapomiz/haGjjgh/rogetunelunujobusa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424025/normal_5fe92cfc41689.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391624/normal_5fd68db99f65a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/15501dd3-61df-43c2-808a-3f3b16dd77af/xaxufejabogowikig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b049300-b30b-4539-a958-37bf52496a09/nitowijuxiw.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/wexepozesaxude.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/angular_form_control_validation_number.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/64017432674.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/12248540360.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C3 5400 bytes
SHA-256: 186202c82e96b678b2525c6a29ad2aa34cbfbe7a06447a1468a99cd31b40a50e
font_01_sfnt_off0000fc01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC01 11288 bytes
SHA-256: 0fa1587be9fe0826c6acfe2a871ce07357d980f3a5d8ef39ae2485c36213bff7

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