Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac69bee7164fda9e…

MALICIOUS

PDF

78.2 KB Created: 2021-03-05 14:18:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 355c0d26444a54e8b113667e59f4d391 SHA-1: d3cabcc14193e0567c417f6a34f7fba055346ce7 SHA-256: ac69bee7164fda9ee234f6623a923162b0afa8dcfcbf6ac5963e10ea45134760
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into clicking it. The document body, though heavily obfuscated, appears to be related to academic search terms, suggesting a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://kuzutuzo.ru/wix?keyword=structuralism+vs+functionalism+compare+and+contrast PDF link annotation
    • http://republvinb.fun/8492716087713m7k.pdfIn PDF document text
    • http://cucoupon.info/83428845576xknaz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420767/normal_60074ef0b3897.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403938/normal_6028859941e92.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470981/normal_5ffa026e5ff1c.pdfIn PDF document text
    • http://fitit.space/problemas_de_aplicacion_ecuaciones_lineales_2x2zof45.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/forupokisip/82731067468.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/photogrammetry_introduction.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/6819141121.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/verezofudelog.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/what_is_the_difference_between_western_and_eastern_concept_of_philosophy.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/vixuduxejitanuvovojerof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74ec7eaf-0607-4c6e-9290-0d455eb60977/sejasipizofuruwobutulamok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82afb0ef-3e67-4ce4-ba38-99887271283c/rokisa.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/ac_web_ultimate_repack_7._7_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/didujedomazezobufolikiku.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/cornell_mba_employment_report.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_off0000f296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF296 5464 bytes
SHA-256: 4e0e9d5835df594ccd838137aa909cde55ba3e6f7a0cb1d61e6fe3a33ef622cc
font_01_sfnt_off0001051c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1051C 12492 bytes
SHA-256: b8e57fb1c2d86e03fdf0068f72e92cf82694b79d3c0e6dfa3da8867accf9f308

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