Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ead94d792c2849a…

MALICIOUS

PDF

62.5 KB Created: 2020-11-10 22:39:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3b715f8a7c78e810360d3ce2fc4df95b SHA-1: dd1c69096de30a262b33439eda4d5c52ca3c1927 SHA-256: 7ead94d792c2849a1839cc110ee3a3b1cf9dded4e6f47c705782a6434a554a1c
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a fake browser/software-install lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/123?keyword=stockx+coupon+code+2019 PDF link annotation
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/4601264.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366309/normal_5f8856b0efc82.pdfIn PDF document text
    • https://koxoganonigowup.weebly.com/uploads/1/3/1/4/131408343/5806971.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450247/normal_5fa1c0879b9b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366645/normal_5f89b870e8af2.pdfIn PDF document text
    • https://mabiredozex.weebly.com/uploads/1/3/4/4/134482212/4429452.pdfIn PDF document text
    • https://bexoligimes.weebly.com/uploads/1/3/4/3/134314561/1537539.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/kozibowisenatu/ro_mage_leveling_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/447ff6d3-3c87-4b9a-94b6-8594eb3624cb/apple_or_orange_before_bed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/453bd76f-7d80-4410-a7c3-15b3ac186c38/43164394552.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61777f97-58e7-492a-b644-9f23531f7244/hitchhiker_s_guide_to_the_galaxy_computer_42.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34ae6c93-962b-47bf-914e-1ae5f1eec402/casio_ga110-1b_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c71cb2dc-5791-44e0-b4a6-1c1083759a80/93277310922.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_off0000b7e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7E9 5268 bytes
SHA-256: b96bea320be763985e76d410d7a7896ef34f75046a9b329cf77fbc686351aa3b
font_01_sfnt_off0000ca04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA04 10396 bytes
SHA-256: b610515c1d24387b5b7ff4ee1acb804cf213484c8ed578df6be9cf0936226b84

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