Malicious PDF — malware analysis report

Static analysis result for SHA-256 c81570e1a3a9f4ad…

MALICIOUS

PDF

79.4 KB Created: 2021-03-27 16:56:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87d870424673cbd448e9017bbe7dd7cc SHA-1: 9270b41906b90f8e4af88373802f73d918a109bf SHA-256: c81570e1a3a9f4ad210cce1a49f7125b7e9768088b820eacaba0ae2bb53facae
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL points to a suspicious domain, likely serving a malicious payload or phishing content. The document body, though heavily obfuscated, contains references to 'Carprog 8. 21', suggesting a lure to download or activate software.

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://botokaw.ru/123?utm_term=carprog+8.+21
    • https://cdn.sqhk.co/kudewigi/hi3nYSu/filij.pdf
    • http://kopalirigel.mypressonline.com/attestation_de_prsence_employeur.pdf
    • https://cdn.sqhk.co/dizukenepu/hrijdie/teacher_s_aide_requirements_illinois.pdf
    • https://cdn-cms.f-static.net/uploads/4408595/normal_601d8c80ebf8c.pdf
    • https://cdn.sqhk.co/liwewajawab/jgjiji7/nebuwenes.pdf
    • https://cdn.sqhk.co/jimavidozeze/ibghzXi/foguwizeloweloparaderowur.pdf
    • http://gogejevi.iblogger.org/novel_cheeky_romance.pdf
    • http://vebifitapex.mypressonline.com/jurnal_bartolinitis.pdf
    • http://rosipale.scienceontheweb.net/jang_newspaper_22_september_2020.pdf
    • https://cdn.sqhk.co/makafabakuna/bhevtZ6/joturaduwitovolevon.pdf
    • https://cdn-cms.f-static.net/uploads/4370273/normal_6039cec831ac8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://musowafotoxipid.epizy.com/33266849877.pdf
    • http://zitasixan.atwebpages.com/90826546420.pdf
    • https://s3.amazonaws.com/dekogamik/41882489437.pdf
    • https://s3.amazonaws.com/fujadabez/tarupikitokisuporox.pdf
    • http://tofixadik.rf.gd/matomoxezilumefa.pdf
    • https://s3.amazonaws.com/xupizewuxere/29874240939.pdf
    • http://zekarevuwo.epizy.com/diferencia_entre_bullying_y_acoso_escolar.pdf
    • http://pejabefi.rf.gd/probability_and_stochastic_processes_solutions.pdf
    • https://s3.amazonaws.com/gitipelut/35477664316.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_off0000e1cb.bin
a74189f920a8d09e6ce60adbaca00f3fc18edb825b940b3b28af538dd41fca33
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CB 4648 bytes
font_01_sfnt_off0000f19d.bin
b75e00fcf4ce8bd33c8768ef9e356d2abcb169828801b06a34068ed34423afb8
pdf-font-stream PDF embedded font (sfnt) at offset 0xF19D 15332 bytes
font_02_sfnt_off0001207e.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x1207E 4324 bytes