Malicious PDF — malware analysis report

Static analysis result for SHA-256 d42b56ffdc59577d…

MALICIOUS

PDF

71.6 KB Created: 2020-12-04 14:42:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f4b8850ff8603e06008586b9f6cd2d0e SHA-1: 9b11f91ba15692e2b533d2b1ba0e437e93745ec3 SHA-256: d42b56ffdc59577d266e4da55b0cf638b2b9ec84e874c99b2e756e547f72fd04
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://ggtraff.ru/strik?utm_term=anatel+pci-e+wlan+card In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403130/normal_5f9cb6cbec503.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403937/normal_5fbefe143987d.pdfIn PDF document text
    • https://gobiduromom.weebly.com/uploads/1/3/4/6/134660247/meriwipu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458144/normal_5fa8ec71e4e6d.pdfIn PDF document text
    • https://donokodupotev.weebly.com/uploads/1/3/4/3/134317189/dadelagebegurow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468550/normal_5fbf0589585d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368777/normal_5f87c3b518456.pdfIn PDF document text
    • https://direwuberegenis.weebly.com/uploads/1/3/4/3/134361890/15185b18a1cd94.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc4d5a48139af03765e4d31/t/5fc818b026a3037b432df13c/1606949040664/all_raid_bosses_borderlands_3.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/extra_rogue_talent_pathfinder.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/cite_report_apa_6th.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f769ec917750a3d83c85/t/5fc23500a97599144e40ddf1/1606563073740/durokodilamimapiriwedudu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9541e1c0-39fa-40c3-931d-0719d27052ab/95918535338.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_off0000da9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9C 5004 bytes
SHA-256: b935781acdc2026178f6df33e57d01c0263fa62b4a1b9d156f16b4fe3429ddfa
font_01_sfnt_off0000ebc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC1 11088 bytes
SHA-256: a9c8a64ae76b305d46b0f3da4c3a72e0673e9e1628e9580587b67af39aacbc10

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