Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7063853282ef120…

MALICIOUS

PDF

169.4 KB Created: 2021-01-18 19:20:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: f131ed738ca81b531283c0b3c8c812e9 SHA-1: 0824f6f1dd9a9a97890550d3d687444d9d25ab50 SHA-256: c7063853282ef12080dad667c664a1ce7d51d50143512c181bee20110421bd9f
102 Risk Score

Malware Insights

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

The PDF contains a link to known malicious redirector infrastructure, indicating an attempt to deliver a malicious payload. The presence of a visual download button further supports a deceptive lure. Although no scripts were explicitly extracted, the ML classifier and redirector link strongly suggest malicious intent, likely involving the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crophysi.ru/aws?utm_term=biology+notes+form+2+free In PDF document text
    • https://cdn.sqhk.co/todusukiraxi/hjheche/lawiwuxubiro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368970/normal_5f903a7669540.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383561/normal_5faaffac6c590.pdfIn PDF document text
    • https://cdn.sqhk.co/lapefuxolu/uFje1jj/video_face_changer_download_for_pc.pdfIn PDF document text
    • https://site-1176273.mozfiles.com/files/1176273/mt_rushmore_location_south_dakota.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371523/normal_5fd676aa3a05b.pdfIn PDF document text
    • https://cdn.sqhk.co/kegufamop/jiftQjd/servco_toy_truck_and_racer.pdfIn PDF document text
    • https://nenarixu.weebly.com/uploads/1/3/4/8/134899789/0424c0effc9f2.pdfIn PDF document text
    • https://kirimobo.weebly.com/uploads/1/3/1/0/131069812/ca429.pdfIn PDF document text
    • https://cdn.sqhk.co/vagewovupug/VOu0M18/turn_off_voice_assistant_samsung_tv.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/7Fiahbq/hospital_ward_vs_room.pdfIn PDF document text
    • https://cdn.sqhk.co/sozaxejiv/5ifghii/green_pan_costco_reviews.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pesuvomekujidi.rf.gd/nobavagiwojoxup.pdfIn PDF document text
    • http://webubekesivamuf.epizy.com/85489839660.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_off00026183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26183 5160 bytes
SHA-256: f3af7fb943369131142ec53e6c43f382b7c5d25bf2cf02c34883cc25598b1373
font_01_sfnt_off00027312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27312 10864 bytes
SHA-256: 4bef2068bc2766a69d6c7e8e2e72b7fd8a9f8b78fc49588ba359dd6c5faa1afd

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