Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca10fa652a141c6f…

MALICIOUS

PDF

72.2 KB Created: 2020-12-21 06:35:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 062d96ae39439753dec60d3b12689643 SHA-1: cad7a5e7338e72f35ba0fe8eac2d91c75e809584 SHA-256: ca10fa652a141c6f151c1d71462d0e84b4a98b600e7a0027e1facebd570061c4
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were extracted, the embedded URL is the primary indicator of compromise and attack vector.

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://gettraff.ru/strik?utm_term=sonic+the+hedgehog+characters+toys In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374188/normal_5f8f51e39ddee.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/3999753.pdfIn PDF document text
    • https://xebivonejawaf.weebly.com/uploads/1/3/4/0/134096192/0c2d1dc7dd63fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f87a87337036.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389821/normal_5fad66d075cd2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/woxorojero/49080054989.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fd2e73e-899c-4d12-98df-10faa8660d55/land_and_water_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5412c27-1174-40cb-8295-01fb0cad2113/wait_for_me_reprise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c355b9b-f2de-4892-8f9d-767ba23583ea/15013987511.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/cdtfa_230_form.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd45c3eb685147a09c264a/t/5fdde566d85ca26442f26196/1608377703546/cinestyle_lut_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22cb5ae3-6814-4fff-9bc2-0821b327661f/41194752572.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F8 5164 bytes
SHA-256: cdbc4fc9412b7d3ff7f7d7a48d5dbd0b35a9f4376cbb3cea4ee0d87b00967507
font_01_sfnt_off0000d964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD964 2012 bytes
SHA-256: 0df9832cfc5af80b801f03965aa32ffa143350b02011ec55e095d3f91a351c64
font_02_sfnt_off0000e29a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29A 10228 bytes
SHA-256: 98b81885b9c672e4b6ff7a86c228971c8a95167f76dfab1b12fc0cd0d901bc80
font_03_sfnt_off000105a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A7 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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