Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e1e75365498b74e…

MALICIOUS

PDF

74.3 KB Created: 2021-03-24 11:00:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22553c28f1fb42b77fbb64f27ba25cc5 SHA-1: db71aa71e03c18e221e56459f0da2527315b3986 SHA-256: 9e1e75365498b74ef37dbe2cbce21c40d125d99b2ef22a350f29f6fd2920d0de
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to 'nipisod.ru', which is a strong indicator of a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to potentially harmful content.

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://nipisod.ru/award?keyword=cours+atomistique+et+liaison+chimique+pdf
    • https://cdn.sqhk.co/jujadiziga/jHDcha5/fuganufukupod.pdf
    • https://cdn.sqhk.co/lexewagoz/oVvyWia/15353051533.pdf
    • http://koparikamoze.scienceontheweb.net/pojolisatifajevivaridode.pdf
    • https://cdn.sqhk.co/kegetaxob/30iaidR/gadewalovazawifefukebu.pdf
    • https://static.s123-cdn-static.com/uploads/4473056/normal_60010e8a7a00d.pdf
    • https://cdn.sqhk.co/moxulofilose/kjijgjc/kelusanuk.pdf
    • https://cdn.sqhk.co/petebeki/gcCgf4w/guvorojogurizaza.pdf
    • https://cdn.sqhk.co/bapinero/f38rhfP/nawivetelolavolo.pdf
    • https://cdn-cms.f-static.net/uploads/4365602/normal_5fd6c66141118.pdf
    • http://biwumani.mywebcommunity.org/79587189929.pdf
    • http://rakadan.sportsontheweb.net/gmat_syllabus_2020.pdf
    • https://cdn.sqhk.co/durotula/idyLhj6/xazobumuzelazadoveseje.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/dc5ebe7d-0294-4d48-b6bf-ac463e1a03f1/31302038390.pdf
    • https://uploads.strikinglycdn.com/files/d320610c-93e8-42ac-83f6-34db82a7bac1/rofatozovipuko.pdf
    • https://uploads.strikinglycdn.com/files/8149e842-ef99-43c4-83ff-6c58cab6972c/nesolatebirowuz.pdf
    • https://uploads.strikinglycdn.com/files/ecd5fa16-f447-4051-ac1b-6bf10de3fbcf/bmw_navigator_6_update_mac.pdf
    • https://uploads.strikinglycdn.com/files/41a145f8-8ef8-4b67-be0f-61eeee138765/35443338149.pdf
    • https://uploads.strikinglycdn.com/files/70a1e237-fc31-479d-b98f-fe825c4c2da0/8992460766.pdf
    • https://uploads.strikinglycdn.com/files/dc6d023c-4b2b-4223-93ca-3c653cd949e4/jiruxurosexuwekesivope.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_off0000e072.bin
a36fa8e47b657b3464838f085760bf629eb4df956c2a6bf473858226933daef9
pdf-font-stream PDF embedded font (sfnt) at offset 0xE072 5428 bytes
font_01_sfnt_off0000f2b1.bin
e2dbd014fc6a156a3b6db134c6ddb89efb13af0fa083f52259a90fe27829078a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B1 12212 bytes