Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c918c5fe0256df6…

MALICIOUS

PDF

57.3 KB Created: 2020-12-17 02:04:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 611ce48582a5b61b2fe12f8649bc27d9 SHA-1: 77e40c817c7f27f06f9dae04bd92b17ae32549dd SHA-256: 8c918c5fe0256df6f78f0a800f4eb08d4a8bf37e0f2afb45a96d14aefa0c2992
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 'traffking.ru'. This indicates the document's primary purpose is to lure users to a potentially harmful external 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 0.9996

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/aws?utm_term=rational+expressions+worksheet+pdf In PDF document text
    • https://gixajukixopa.weebly.com/uploads/1/3/4/8/134877082/digin.pdfIn PDF document text
    • https://togutugu.weebly.com/uploads/1/3/4/6/134617883/futemibepalojuda.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/5fc54bccab79f442f2469dcf/t/5fd6e677481cfa31addb3e17/1607919227417/android_programming_tutorial_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/sony_hvr_v1u_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc155cc8139af037648468f/t/5fd15ff3ad61ab58317c86de/1607557107831/72808400465.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0dbf559-cab2-4d5d-9574-3b66e1e59759/melerepuje.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f169085bf90c0efd4cbb/t/5fc221b03485235c860f2f04/1606558128620/chocolate_gravy_recipe_without_flour.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc28d7517e7202640f4b4d6/t/5fca9c8652c55e381a1807c7/1607113862619/zombie_apocalypse_will_you_survive_quiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbafc5ca-8b64-4481-9b3d-f257a238e756/tebizazewupikomevutuxes.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10ac260f2895dc1e8a19d/t/5fca324d8d0ac92c7bec062d/1607086669917/rudikexegiwowutodaw.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5c45068612547ed7f5dc1/t/5fcb353e8dcc5603bef0b157/1607152958847/karaoke_sing_songs.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_off0000a9c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9C2 5360 bytes
SHA-256: f086337e9de758a7ea445ee89f5eba9741143d00d5d6e0a3504b1ba15a27758b
font_01_sfnt_off0000bc0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC0E 8400 bytes
SHA-256: f8b5a6e7b824b1c4662ca422734bb7ae5b57c6ef121916336fdd1e96e63de983

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