Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d09a5229dab55ce…

MALICIOUS

PDF

68.5 KB Created: 2021-04-04 22:25:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59ba4555b73fee6deb742282908e8564 SHA-1: d04d6f4f7985a4a682bd988e43af238c5a9b17c4 SHA-256: 1d09a5229dab55ce786cfa49d24dfb37b9e36d23b158f659a0b824a0067e1129
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, with a critical heuristic firing for ClamAV detection. It contains an embedded external URI pointing to a suspicious domain, likely intended to deliver a payload or phish credentials. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/strik?utm_term=the+leftovers+show+food
    • https://fotiterik.weebly.com/uploads/1/3/5/3/135328456/jefitogaripar-vitufeva-zugirake-loren.pdf
    • http://zelupelar.iblogger.org/list_of_all_medical_abbreviations.pdf
    • https://fobizolavavoka.weebly.com/uploads/1/3/1/4/131406440/6337352.pdf
    • https://cdn.sqhk.co/zibepidok/MJiixic/87137228196.pdf
    • https://cdn.sqhk.co/dewufidabo/nA34hj2/border_patrol_salary_california.pdf
    • https://vutuwoti.weebly.com/uploads/1/3/4/7/134720014/domariguwiwa.pdf
    • https://kafememum.weebly.com/uploads/1/3/4/6/134616831/lodokopizijajunelapi.pdf
    • http://kefinefure.iblogger.org/21859953886.pdf
    • https://cdn.sqhk.co/norowitidot/9dDhfhb/nugixov.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jolozidabi/98890341454.pdf
    • https://s3.amazonaws.com/kozewuposoridil/before_the_dawn_movie.pdf
    • https://s3.amazonaws.com/rebomedug/pakekenukumixaligenira.pdf
    • http://bilexijo.rf.gd/android_5_delete_google_account.pdf
    • http://tomowuteraj.epizy.com/chromosome_structure_and_function_download.pdf
    • https://s3.amazonaws.com/kegovev/xosigutuzupakixita.pdf
    • https://5c2cca0d-3a4e-48b0-93bf-8ac6c0c026cb.filesusr.com/ugd/271e65_a7c5aa27ab684686a472bd581353fb31.pdf?index=true
    • https://3e1d1bad-f645-4ebd-ac75-469e7ff7c972.filesusr.com/ugd/e745be_8c6c9b9b938d4909b3fd4b812a198b97.pdf?index=true
    • http://wubezirinipo.epizy.com/whatsapp_app_lock.pdf
    • https://a208a2de-cee2-48c2-86e3-c620a022946d.filesusr.com/ugd/dda32d_7220601c5d7c4602be6418cf1d02c9fa.pdf?index=true
    • http://sofojosib.rf.gd/pesunelunifitexuvabadiwov.pdf
    • https://1f2f8e77-98df-4c5e-b88a-83bc2b612b58.filesusr.com/ugd/5c7528_a0a48c74f33047df8df8698cf756ebd8.pdf?index=true
    • 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_off0000d120.bin
b89f6392ffd4dfb0b33415793f044360e26e42b0777e19dfb7d91db695d6c4b7
pdf-font-stream PDF embedded font (sfnt) at offset 0xD120 4888 bytes
font_01_sfnt_off0000e1d2.bin
210f96dce3bd7de2120de7058cf63437dafe38f2e34d6431da47c1b29b4286e4
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D2 10344 bytes