Malicious PDF — malware analysis report

Static analysis result for SHA-256 a20b176937d7779e…

MALICIOUS

PDF

87.3 KB Created: 2021-03-19 11:42:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e396a5443f8482ea6629b8aeb7b9a8a2 SHA-1: 9ff43aa937a1ac6930aaa4d10bb226daa80d4bb9 SHA-256: a20b176937d7779ebcbd4f60444da18f2f2e7c7d0e6843192d086d852af93bb7
134 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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
  • 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://xezojetit.ru/strik?utm_term=proficy+machine+edition+7.0+software+free+download PDF link annotation
    • https://cdn.sqhk.co/jomububorava/cjefgcY/cutz_barber_shop_nanuet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482415/normal_5fced70e51d3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459926/normal_6026731fec173.pdfIn PDF document text
    • http://matawobedopikam.mywebcommunity.org/imagen_iso_windows_7.pdfIn PDF document text
    • https://gejeximiba.weebly.com/uploads/1/3/4/8/134897602/dc5d162c7fea.pdfIn PDF document text
    • https://sizikipumaxa.weebly.com/uploads/1/3/0/7/130739349/db83f5111a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445340/normal_6025f96177bb4.pdfIn PDF document text
    • https://cdn.sqhk.co/vizebika/ErCfQjf/38550896709.pdfIn PDF document text
    • http://pifofobexaxel.mypressonline.com/noxijogob.pdfIn PDF document text
    • https://cdn.sqhk.co/bogulevim/bhijeJX/marshmallow_plant_recipe.pdfIn PDF document text
    • https://cdn.sqhk.co/boxokozofe/hcfhjid/ninja_foodi_grill_xl_6_in_1_review.pdfIn PDF document text
    • https://cdn.sqhk.co/tifobebe/WSjcfp0/tibum.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://77a48bbd-706a-45f8-a225-ac1cc02029d7.filesusr.com/ugd/3be48b_6a0377bdb6b94934b7f7a9bc37fc9996.pdf?index=trueIn PDF document text
    • https://6346cca1-8be9-442e-91e0-e35201572fa6.filesusr.com/ugd/a8c077_c734d7a01f134ef7aa7f1785fdb99c7f.pdf?index=trueIn PDF document text
    • http://nujilexulajuwup.atwebpages.com/rinaxizanipoxemomelune.pdfIn PDF document text
    • http://livirava.atwebpages.com/fowegafenexifolinobinoluk.pdfIn PDF document text
    • http://medazupu.onlinewebshop.net/tepugoluganovid.pdfIn PDF document text
    • https://www.cancer.gov/coronavirusIn 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_off0001168a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1168A 5712 bytes
SHA-256: ed5450af8dedb0d3ab3b0f5e335bfe74b3f906d376e3c20a6281319c25e73556
font_01_sfnt_off000129f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129F8 11068 bytes
SHA-256: 4dd18a42f8e1f3d355b62f6ab2c5fc4cdaf4a86390aec0bc13619b9a0581df30

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