Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1df8056a83d7b33…

MALICIOUS

PDF

68.4 KB Created: 2020-12-02 11:01:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 491e31c861561642848f5c4b13c0bdab SHA-1: 287b26134c1cf333ea1b1665aa3378cf08572dfc SHA-256: d1df8056a83d7b337a79a40877fb6e1eb190c51d0ab64ccc2b7e55c8e4cc8a48
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ggtraff.ru/123?utm_term=honda+connect+apk+y%25C3%25BCkleme In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393181/normal_5f8f5c50d1fe5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367019/normal_5f9fdd5b96dd0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383321/normal_5f9377c8e56fc.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/a71328d0-29b4-4d27-b339-cd715bd7f4a5/linear_models_with_r_faraway.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d9eaead-e1e8-4960-a54d-0c8527ae2e17/46053275354.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10ac260f2895dc1e8a19d/t/5fc23bb52dd96f5918389e46/1606564790150/nudujiwofojejunude.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0b4e4c89e1c4b8fbd626a/t/5fc1100c145a8629dcd683db/1606488081189/traxxas_e_maxx_brushless_parts_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1ca73b2-bcd7-4d59-9162-fdf7f2bb5911/9826713109.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffe2c5e8-06df-48e8-8cfb-58a863326419/tokyo_mirage_sessions_ost.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/61816030998.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/dynamo_the_book_of_secrets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/790c1651-e092-4a3c-bf9b-70687b1a6e8f/how_to_sync_ipod_with_itunes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6619185d-0d8e-47de-a109-225d6cf7729b/xopulase.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_off0000cbcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBCF 5192 bytes
SHA-256: e361f2a5dda011da3dda224874958c84a6ed970e8ffcf11ec93a04517c2b2bfa
font_01_sfnt_off0000dd42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD42 12180 bytes
SHA-256: 2ad30ed49dd096fad2a5db68a50b1517da2d65e5c32682f6e2178d03eac29171

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