Malicious PDF — malware analysis report

Static analysis result for SHA-256 eff938c219c53e65…

MALICIOUS

PDF

72.3 KB Created: 2020-11-27 01:27:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 871acdd6d072e496be1770d5f0c1515c SHA-1: d26a790c2f69e2244db2277bb1f3f90ff19c85c9 SHA-256: eff938c219c53e657089aeb21836c095bbaca67d34b0634b80bee4561468015e
96 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 an ML classifier. 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 0.9997

Heuristics 4

  • 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.
  • 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://trafffi.ru/strik?utm_term=sony+kds-60a2000+owners+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4487386/normal_5fb93cabb913b.pdfIn PDF document text
    • https://kivofijola.weebly.com/uploads/1/3/4/3/134309380/5001247.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gizonukorad/illustrated_aikido_techniques.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/62348960065.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/bisadosiduvat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a792095b-8582-47f4-8a08-d0ce36454aea/vugim.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/luvetadudurasadikuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a3500ba-251d-459e-a475-b1a180a8d423/salidigu.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/54599117102.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/divinuw.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/princess_mononoke_character_sheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE00 5548 bytes
SHA-256: 8b5d1f0d276f4c13f02c305409f52969125b0bdc184c3856a5a42f5d62389cbd
font_01_sfnt_off0000e0d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D1 11220 bytes
SHA-256: eb7de9ca000de5b25f30e808f15a00afe07a34007bf248bf8648cae34db8efdb
font_02_sfnt_off000106b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B1 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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