Malicious PDF — malware analysis report

Static analysis result for SHA-256 99ff935f59a6ee13…

MALICIOUS

PDF

62.9 KB Created: 2020-12-01 19:41:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b0b53a86831d6b002ad8ddb94c10327b SHA-1: 6fbac13f000d5fe9d95ae70f525ec5579ae3af2b SHA-256: 99ff935f59a6ee13511de17e896153ffeb6bb839e4c615aea7595a24ae124c7b
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. An external URI pointing to 'traffine.ru' was extracted, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the overall detection score support a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffine.ru/strik?utm_term=plymouth+meeting+amc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370059/normal_5f9109b84074d.pdfIn PDF document text
    • https://xojenupikubola.weebly.com/uploads/1/3/4/7/134747345/fogunove_gopegumowa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381751/normal_5f9cab1a1a8a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370541/normal_5f928000ead64.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/d9db0405-d9dc-4b41-ba88-021534f5a1be/kemalaxabu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67bf269c-49ae-488e-97d0-8af80033f5e7/tawenojimibotununopumi.pdfIn PDF document text
    • https://s3.amazonaws.com/wejalixex/albany_county_assessor_office_laramie_wy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cb33ff1-1cd8-44c0-94ea-ef7d2ab12c7b/17439326849.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44576932-298d-4a83-ab95-7de6c336a125/33073274817.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/163a22fe-f2a3-4647-9914-dd4f17a39d68/sosarerupegegox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c55b45b2-0ca7-4d51-8031-d8626366851e/turbo_charged_prelude_online_subtitrat.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/deccan_chronicle_astroguide_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/lisimalamodowadutesuxol.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_off0000bb17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB17 5040 bytes
SHA-256: 2df3c807b617620aec9dfe74fa90fa02b1cea136fc7e38c7039d59e37c5be299
font_01_sfnt_off0000cc27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC27 10432 bytes
SHA-256: 12caf1003287bb4f23f28dfd2b3f8a5bb2179e5fc51a175ef59d0d98b1c9c5c8