Malicious PDF — malware analysis report

Static analysis result for SHA-256 108b31cfa3ecb673…

MALICIOUS

PDF

61.5 KB Created: 2020-12-17 15:16:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c670a50f50606067285519f8542acf95 SHA-1: 150219c39c81a1f6383f1b284b7f51405eb52957 SHA-256: 108b31cfa3ecb673ae495bab855bd9e3337442cb8e8f68bad5b1afecd30d09c3
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffking.ru/strik?utm_term=albany+park+library+events'. This URL is likely used to lure users to a malicious site. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffking.ru/strik?utm_term=albany+park+library+events In PDF document text
    • https://cdn-cms.f-static.net/uploads/4448124/normal_5fb4b0fdb68d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379744/normal_5f8d6b0aeb4a3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc535439698b02c7f3cd34f/t/5fc8e9954bd5e6389e707a1a/1607002518209/21892715963.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc15a4327a199023ab881d8/t/5fc5d90ae18c5c478ec5fe44/1606801675471/1993_jeep_grand_cherokee.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/325cc4fb-77e0-42b1-91ed-2e575276cc50/pazasebekorarerukeva.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5b2678139af037665e521/t/5fc9a15e2ae1264a038d0f08/1607049566709/breadwinners_cafe_lunch_menu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10b71bdb33045eec31c8e/t/5fcea024e0c378597cf4e1ef/1607376932748/vazinuwujivijodiwud.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2bb5d11f6a41984918bba/t/5fc5afc69d7936484051ff0c/1606791113754/1902310555.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc110906609fd0ee7923de0/t/5fc262dc145a8629dcfdce65/1606574818652/jackson_art_supplies_perth.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/95183626826.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/auto_signal_refresher_apk.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_off0000b20a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB20A 5168 bytes
SHA-256: eeb9ed7b8a7899345791b8de54df7f8d4ac58acd2a448f45e03d93df4da07ca3
font_01_sfnt_off0000c3b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3B4 11240 bytes
SHA-256: 17d4423012770663a1c13ef001792b00e7cf35e43c0fed83c77019501f51f5a2

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