Malicious PDF — malware analysis report

Static analysis result for SHA-256 53de692504cc61e4…

MALICIOUS

PDF

60.5 KB Created: 2020-11-24 19:48:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c2fb57da97e7b16ba5dfe04e3188f30e SHA-1: bee581d9369d17eb836fe2a6480bc2402700e9f2 SHA-256: 53de692504cc61e47cec511f2d43564b954c92f54c6b0902cadf5b163c4f0d0f
170 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. It uses an urgency-based lure. 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 0.9994

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=oatey+perfect+slope+40+x+60 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4404292/normal_5faf291d11bd4.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/vifotatilaw.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/lodazojamuva/40005462952.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/wamuvizedalixufuxato.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/ragejuzefadazesuwepusa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1bed3a7-094f-4a7f-9bab-04ef5682baf3/73524711646.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/methods_of_educational_psychology.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/early_child_development_stages.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/rusojurilezawarobaxiwoso.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/4803361743.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_off0000adbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADBB 5592 bytes
SHA-256: 5a8c0f2962cbd7e778cef73f4e1bee7415f02c563b2905e6fce187320aaea544
font_01_sfnt_off0000c0de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0DE 10568 bytes
SHA-256: d4f637ec27f17823284c30be380a41626470b45687ccf58e8d9ed94e6fb6da2a

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