Malicious PDF — malware analysis report

Static analysis result for SHA-256 ded4ab14df6356f9…

MALICIOUS

PDF

77.0 KB Created: 2021-03-20 05:39:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 86ae9c49f83568c512588a56217f49bd SHA-1: d7dcb4f3edef993e8b3cdf99f72fcc7cedc38905 SHA-256: ded4ab14df6356f953a264816ee29c950ef954456913f7d78ce8f30aa6eb0464
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to downloading an application ('traffic rider mod money apk'). An external URI pointing to 'jottigo.ru' was extracted, which is likely the download source.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jottigo.ru/123?utm_term=traffic+rider+mod+money+apk+1.+7 PDF link annotation
    • http://tujugataro.22web.org/chandramukhi_tamil_movie_for_free.pdfIn PDF document text
    • https://tuxedibuzi.weebly.com/uploads/1/3/5/3/135350702/7278a870805a42b.pdfIn PDF document text
    • http://kevifiregerufug.scienceontheweb.net/23770846622.pdfIn PDF document text
    • https://zuvumurujibuza.weebly.com/uploads/1/3/0/7/130739557/bibisaxoxubibutux.pdfIn PDF document text
    • https://lekozeva.weebly.com/uploads/1/3/5/9/135964777/pisigemog.pdfIn PDF document text
    • https://lezafopiga.weebly.com/uploads/1/3/4/6/134628758/07509a896924997.pdfIn PDF document text
    • http://kitukotobov.medianewsonline.com/kogakedurejuzabunadiv.pdfIn PDF document text
    • http://xiwixewepisez.22web.org/fetezulow.pdfIn PDF document text
    • https://kujavubudiza.weebly.com/uploads/1/3/4/4/134497056/84e7bc.pdfIn PDF document text
    • http://piwofoterif.sportsontheweb.net/neet_biology_notes_free_download.pdfIn PDF document text
    • http://mevesepegubisis.scienceontheweb.net/mifepaxo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ruvugenoguj.rf.gd/juba_arabic_english_dictionary.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/gowawitupime.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/ionic_app_stuck_on_splash_screen_android.pdfIn PDF document text
    • http://fifajepetu.rf.gd/911810517.pdfIn PDF document text
    • http://bivojeda.atwebpages.com/demoritovesulomu.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/32387539723.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/schwammig_formuliert_englisch.pdfIn PDF document text
    • http://bovaxibeloxev.rf.gd/xomute.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/zawozitugirabakojima.pdfIn PDF document text
    • http://suwuxuk.epizy.com/vowezuvasunos.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_off0000f020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF020 5372 bytes
SHA-256: d5fecb372510e18fa31aa121ced27526c34d614bffb2efbc814e8f8a5f2aa0e7
font_01_sfnt_off00010271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10271 10696 bytes
SHA-256: 48e94da72c1724b46a8c65efd517d3db861063f71b68e7dd50a2ceef053e386f

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