Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bad422c304edb76…

MALICIOUS

PDF

66.4 KB Created: 2020-12-11 05:54:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ce20177a5fbc1a41e60e62d6b342824f SHA-1: 52d59b1fd813a2b04ab159a960035ad1430e403a SHA-256: 2bad422c304edb76bead10029adde4ce12d46e567bb73188cdebc0d4393adcd7
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. This, combined with a high ML classifier score and ClamAV detection, strongly indicates malicious intent. The presence of a 'download button' heuristic further supports the lure-based attack pattern. Although no scripts were explicitly extracted, the malicious URL is the primary indicator of compromise.

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://ggtraff.ru/wb?keyword=accountancy%20theory%20class%2012%20pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403541/normal_5f99bb68d09be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426822/normal_5fbf52145e39c.pdfIn PDF document text
    • https://wipasajumavadus.weebly.com/uploads/1/3/4/7/134775966/a3127fc84e2.pdfIn PDF document text
    • https://jasasenud.weebly.com/uploads/1/3/4/1/134131975/21fb2c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/dewugaluwo.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/wind_blowing_sound_effects_free.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/cisco_asa_firepower_setup_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc112c117e7202640eb3140/t/5fc18906e18c5c478e35fecd/1606519047207/melidilakazalerebeduteg.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0a32b474932ca2698050/1606224440404/672882774.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd30a1e0c7a77e23a22694/1606234274074/bowike.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/emergency_response_plan_template.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_off0000c65f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC65F 5520 bytes
SHA-256: ff213e2f98190ffed147d04711c13033a5d13cd0b79d4e7930899d8435e17b01
font_01_sfnt_off0000d934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD934 10696 bytes
SHA-256: 9da040965c335113300636c39026a070b25a7047f37701fffa52fe0560fd6f23

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