Malicious PDF — malware analysis report

Static analysis result for SHA-256 82e56f46be3a4def…

MALICIOUS

PDF

70.8 KB Created: 2020-12-16 20:55:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 847032e5a87e5e780ababbc3c964cbf6 SHA-1: c106b21d8209a9c2b27c3f270139d1a500b92536 SHA-256: 82e56f46be3a4def3479e7cc6bddf529108a908b3c1cc4980c3da44896990dd8
156 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. 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 0.9998

Heuristics 5

  • 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.
  • 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://traffking.ru/strik?utm_term=silica+polarity+index PDF link annotation
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/1039707.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426687/normal_5fd62b88613a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370737/normal_5f8ad0707bd11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408478/normal_5fbf61c4242fc.pdfIn PDF document text
    • https://lufukosiresefo.weebly.com/uploads/1/3/4/7/134707539/f709c2f.pdfIn PDF document text
    • https://bojemesazam.weebly.com/uploads/1/3/4/5/134598919/dijopijesa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493578/normal_5fd9aba7e15d3.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/e5bcd2697.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450635/normal_5fa2ae5fdb72e.pdfIn PDF document text
    • https://kipuxemoxux.weebly.com/uploads/1/3/4/6/134616309/2273328.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/60adb232-38bf-4131-9c41-a35f5b9ab1d7/39716364805.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e00a17b6-320f-46c3-8579-af32079a3dab/11121680920.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/628b9f78-46bb-4c10-b2f0-568ab8ab8c1c/30320691530.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a39d741e-e233-4b32-b634-b526ef70e5a1/xubarojuligekajew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fad9166b-6291-48e0-8c92-b3e86ba11b5e/46171590135.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5513b5b6-a7da-4a56-96dd-4eb9fcb9e3be/jakegobifegak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d985a874-8326-43b4-8de1-794044c87ad7/27699144348.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_off0000d67c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD67C 5164 bytes
SHA-256: 5c0a8ce0a4a195b35860a3954d1b4dd6717dc8ec040b82d2d69b40dea027009f
font_01_sfnt_off0000e829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE829 10900 bytes
SHA-256: 9b0e944505afe4e1a4ca85ac1f95515993ba89a7b2300ce025d66f71d3eb4644

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