Malicious PDF — malware analysis report

Static analysis result for SHA-256 61788fde9aec37b4…

MALICIOUS

PDF

38.2 KB Created: 2020-11-07 08:21:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b1b6ba8d62739c102d806906e4f90fc6 SHA-1: d63fb7ccf0216fd1416f2537c47569fa31c04877 SHA-256: 61788fde9aec37b4c22d4e1a22ba7b62faa67fa6e6eafffba57198459ccc2619
142 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a malicious redirector link and heuristics indicate it uses a download button lure and password-protected archive instructions. The ML classifier also flagged this PDF as malicious. The primary IOC is the redirector URL, which likely leads to a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://gettraff.ru/aws?keyword=intellij+idea+license+server+address In PDF document text
    • https://zasesitezo.weebly.com/uploads/1/3/3/9/133986829/4645188.pdfIn PDF document text
    • https://sabitafev.weebly.com/uploads/1/3/4/3/134308069/a586eb9ba9e02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365635/normal_5f8997ab1bc76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f9018612955b.pdfIn PDF document text
    • https://bazulerijodinib.weebly.com/uploads/1/3/1/8/131856415/ravemitenixajuma.pdfIn PDF document text
    • https://rarasaxemog.weebly.com/uploads/1/3/4/6/134611000/wakapinikiro_zojenenegezud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fa3be95-9d31-4757-babc-3d231116d0fb/20899856161.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3d32d8e-abf6-47cc-ad63-6af0e8ed0cd4/41877299120.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/468f3bd7-e39e-4a94-88cb-f139b0b01a6c/44688885250.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/852c6561-0092-4466-83c6-4c570cf635d7/doxadunogonef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78f1bf36-4506-4f66-8948-5dd99ff190c9/9._snf_kimya.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_off00005553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5553 5008 bytes
SHA-256: 53105a889c2daee058c9f8b358632197124bed715c56a5c362b5ca73803a939a
font_01_sfnt_off00006671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6671 11004 bytes
SHA-256: 19e627a268f6a52a5565b57a28a98e16a432e126d062968a3ca7352a49ca19c7

Open this report in the interactive analyzer, or submit your own file for analysis.