Malicious PDF — malware analysis report

Static analysis result for SHA-256 c354578a1903aa05…

MALICIOUS

PDF

95.9 KB Created: 2021-01-11 23:23:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 18033bd018f93cadcfba123b24333f3a SHA-1: 80cfd978c41bd98994ce0549d898637074875b5d SHA-256: c354578a1903aa05e50e971dcf15af29f3c74221a1fe4761d56bda41f8f45274
96 Risk Score

Malware Insights

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

The PDF 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 a strong indicator of a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site.

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://traffset.ru/aws?utm_term=fluvial+landforms+slideshare PDF link annotation
    • https://site-1203268.mozfiles.com/files/1203268/38639379407.pdfIn PDF document text
    • https://site-1175981.mozfiles.com/files/1175981/school_management_software_application_key_and_unlock_key.pdfIn PDF document text
    • https://cdn.sqhk.co/fozuwasixeja/kgcjeia/frosty_ice_cream_truck_great_falls_mt.pdfIn PDF document text
    • https://site-1166710.mozfiles.com/files/1166710/wuliruvujo.pdfIn PDF document text
    • https://site-1175494.mozfiles.com/files/1175494/dozubupun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465908/normal_5fa5834188b0f.pdfIn PDF document text
    • https://site-1168500.mozfiles.com/files/1168500/filifuzajejomatovu.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.thdl.org/http://www.thdl.org/TibetanIn PDF document text
    • https://s3.amazonaws.com/povodijirig/bridges_in_mathematics_kindergarten.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/top_10_warship_games_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/37005798410.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/gerepoxefabesupu.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/word_2010_avery_5160_template.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
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlTibetanIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12337 2072 bytes
SHA-256: 4cfb8a67fc149cc975b43d33ffca7d7f5a19345a6b41e3c5ad9ce90e953ecb75
font_01_sfnt_off00012cc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC2 5160 bytes
SHA-256: 10ea504e858713c99789c3d29a475b5db658cae4e731c9fb1c8e9f0841d47435
font_02_sfnt_off00013e35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E35 8544 bytes
SHA-256: aea1749ee035a8088c539db0e0ec7e902f05647c987b74b30b2b0c810e37b897
font_03_sfnt_off00014ec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EC3 10328 bytes
SHA-256: c2b891939921afe42cc6c5c38dfec55c387fa0a3a72061b05be7899652abef80

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