Malicious PDF — malware analysis report

Static analysis result for SHA-256 7939da5e6bc8d76e…

MALICIOUS

PDF

40.0 KB Created: 2020-11-04 00:40:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d024eb247f52e1f26b6954ea5461a8ab SHA-1: 1f95863796e3b238160a79575f73a26bdece9a93 SHA-256: 7939da5e6bc8d76e91abcf540242f2c0cf3fe37fede00b69373b64d67b511fb1
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a link to a known malicious redirector, suggesting a phishing or scam attempt. The document body and embedded links are designed to appear as 'unblocked games' to entice clicks. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely to lead users to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.
  • 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://ttraff.ru/123?keyword=douchebags+chick+unblocked+games In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385198/normal_5f9a491086a39.pdfIn PDF document text
    • https://jatasurow.weebly.com/uploads/1/3/4/3/134358583/pugapesivenijezo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404107/normal_5fa05d62b7351.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_5f8e6cbcc5511.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380871/normal_5f8cf8c6dd2f5.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/b5ef9b62-e218-4792-bb28-26d77362d602/10073464206.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/57038068413.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/befopiwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed35f177-10af-4f66-bd4a-d651ccd46e70/nuwumetige.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/100_dresses.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_off00005c20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C20 5460 bytes
SHA-256: 5e716a329df202b15cfb7d59cf801519e5c1312fe011beadb3b36dc484ba4d15
font_01_sfnt_off00006e93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E93 10932 bytes
SHA-256: 9afc41774175c99418b5b9f4a4b81286c76c17b852564dbe16fe97d08cabc4c6

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