Malicious PDF — malware analysis report

Static analysis result for SHA-256 36900a5718158cec…

MALICIOUS

PDF

71.1 KB Created: 2020-11-26 02:49:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: bf5d2863a7a15d31f060733124c13c07 SHA-1: 90dc44fad066403cc1df8a7cf009215b3f465bd0 SHA-256: 36900a5718158cec28f54748b81b98c2486b302e62d6df0791eec01482864f8f
162 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://cctraff.ru/strik?utm_term=cat+mouse+apk+pure In PDF document text
    • https://cdn-cms.f-static.net/uploads/4473903/normal_5fad4e720bd21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421639/normal_5fba90f7bb330.pdfIn PDF document text
    • https://vowopazi.weebly.com/uploads/1/3/4/0/134096587/5b6cf60ba22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369309/normal_5f8af46ad711d.pdfIn PDF document text
    • https://xezuzevujuniz.weebly.com/uploads/1/3/4/5/134586082/7873521.pdfIn PDF document text
    • https://nimewoguvinu.weebly.com/uploads/1/3/4/4/134433183/buzijirefen_zojofekakis.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/b2077365-708e-42d9-898e-3beb865211d7/xebabajubojeruwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3140af75-8378-42ba-9aec-0ef300e47572/truncated_pyramid_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f4e5096-00f2-4384-a04c-bc68be909dd5/fexipugikoke.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/cnc_machine_tool_design.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/buvitafovisopelopevekob.pdfIn PDF document text
    • https://s3.amazonaws.com/giwurode/18977235047.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 8

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_off0000cb7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB7C 4748 bytes
SHA-256: 378fe65c541e514df629948305997c58ae605c9eea53a163e73ddf3c97d00ce1
font_01_sfnt_off0000dba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA5 11208 bytes
SHA-256: b936db4611f1edff0230ea4b755e44b283685f1be71f840bdba9cab73c0fe015
font_02_sfnt_off000101cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CD 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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