Malicious PDF — malware analysis report

Static analysis result for SHA-256 888766f7df409f59…

MALICIOUS

PDF

70.6 KB Created: 2020-12-04 03:31:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: cf3486d1692f2a5c226616466f390a63 SHA-1: 2252a6f7ce52e2650a9ccc946d0eb4ce6a7c7131 SHA-256: 888766f7df409f59d91e04e4911fc270517b3450cdebe68233888b1aebb34e30
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 0.9966

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/strik?utm_term=mankato+east+high+school+supply+list In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387806/normal_5fb48702d9d1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366628/normal_5f88699a3298b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407997/normal_5f9c09b8a0ac2.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://uploads.strikinglycdn.com/files/ccab7a0e-10dc-4c06-a464-aaeb5c785aaa/12212700857.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf094fa04221c71e5bc29/1606283413906/tewibolimefufazinepobifis.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbceef4ef3361272aeaa354/1606217461457/88079137293.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc52592e2fce462bca77432/t/5fc86817217b3604eddba96b/1606969371393/samsung_level_box_slim_price.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54038c89e1c4b8fdb3a59/t/5fc98910856278751751e421/1607043345987/fluid_wallpaper_app.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e2ed17e7202640ea1bf0/t/5fc1378ba97599144e23b0ae/1606498187458/manifest_destiny_apush_dbq.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

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8E8 5152 bytes
SHA-256: 43f87c81dc288a5f6c97115494608de847fe51d3e29fb1473a3fd294846eca3c
font_01_sfnt_off0000da7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7B 10860 bytes
SHA-256: 146daecddc54fadcfcf9eac49e171eb38a3ff1f32c35cf9f693dfdf4c52e1f11
font_02_sfnt_off0000ff8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8A 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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