Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ddb240c00f39e9d…

MALICIOUS

PDF

75.9 KB Created: 2020-12-03 18:21:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0951250cb8410f9a2fc34246cf4149b3 SHA-1: d4edfe6503b7d6575311ec0868ac129fcaffa260 SHA-256: 1ddb240c00f39e9da79335596df287aae7a945b2e2247a228c08e94ff269f8ff
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'traffset.ru' which is associated with the lure of downloading 'gta san andreas apk'. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to trick users into downloading further malware.

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://traffset.ru/aws?utm_term=aptoide+gta+san+andreas+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410722/normal_5f95390d54e13.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4bd5a22-069c-4965-88f8-d9cc065725a4/xewile.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/register_of_deeds_randolph_county_nc.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/abrahaminte_santhathikal_malayalam_film_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/gapok.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/bnf_google_drive.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/unlimited_keys_for_farmville_2_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/area_a4_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bf535eb-c645-4ee3-b124-3d07e21bba06/trb_roundabout_conference_2020_6th.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/borrowed_car_agreement_california.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/descargar_aplicaciones_para_celular_android_play_store.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/spectrum_remote_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/411878670.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/flood_news_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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000fcff.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xFCFF 22080 bytes
SHA-256: c108a18368679f568e293bc66b6c26de42f499c8bfbfa000ccd0fc57a54afa12
font_00_sfnt_off0000c989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC989 5148 bytes
SHA-256: 47cd9f754b88603bd79f59ba89fb18fad79e7b03a132d4a99014ff5eb9403fa9
font_01_sfnt_off0000db23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB23 10336 bytes
SHA-256: 756059f57b15043bddd27d84a6b0f061e554f96c50b44ab122a452ec6663ae4e

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