Malicious PDF — malware analysis report

Static analysis result for SHA-256 5de9387ee6785826…

MALICIOUS

PDF

82.0 KB Created: 2021-09-14 05:21:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 46eb4f2add65b185160928e7963318d5 SHA-1: cd7c19ead8eb277680f706cd88362848ef5e938b SHA-256: 5de9387ee67858268c0e2eca67d3ddf022387496b2a2fa04ab959852f3c8549b
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 0.9974

Heuristics 4

  • 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.
  • 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://propertiproperty.com/Uploads/userfiles/files/74494184376.pdf In PDF document text
    • https://ofly.om-digitalsolutions.cn/upload/files/24843472659.pdfIn PDF document text
    • http://tcgardening.com/userfiles/file/2021090413492973499.pdfIn PDF document text
    • https://deltarealestate-eg.com/userfiles/file/36423851974.pdfIn PDF document text
    • http://fxlcd.com/upload/file/99091647215.pdfIn PDF document text
    • https://saikekanglun.com/filespath/files/20210914100223.pdfIn PDF document text
    • http://jungvassar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/moponisiwime.pdfIn PDF document text
    • http://dh-life.com/ckfinder/userfiles/files/peziwezugi.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/82831463222.pdfIn PDF document text
    • http://metaglas.kr/userData/board/file/73510297056.pdfIn PDF document text
    • http://teraval.cz/res/file/51545760601.pdfIn PDF document text
    • https://silverbirdmarketing.com/pages/images/file/27483141961.pdfIn PDF document text
    • http://forma8.kz/ckfinder/userfiles/files/47916357100.pdfIn PDF document text
    • https://leanuslab.com/UserFiles/file/99074595869.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/piluwak.pdfIn PDF document text
    • https://olgunbey.com/upload/ckfinder/files/7467850798.pdfIn PDF document text
    • https://alpasol.e-giant.net/upload/files/laxapowitiroselab.pdfIn PDF document text
    • http://mxm-hosting.nl/img/editor/file/depag.pdfIn PDF document text
    • http://boldogelet.hu/media/rotejatonadaxepatipan.pdfIn PDF document text
    • http://chiangmai-clean.com/user_img/files/63732626603.pdfIn PDF document text
    • https://nedimgame.com/calisma2/files/uploads/sakoxune.pdfIn PDF document text
    • https://bunexim.dascalita.ro/app/webroot/files/userfiles/files/67489580908.pdfIn PDF document text
    • http://elcivan.com/admin/UserFiles/file/jejenowumovebegeda.pdfIn PDF document text
    • https://www.artikel238.nl/emmwebbit/resources/ckfinder/userfiles/files/30220479355.pdfIn PDF document text
    • http://fuhua.tumujike.com/assets/upload/files/202109130229468741.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=die+n%C3%BCtzlichsten+apps+f%C3%BCr+androidPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D8 18392 bytes
SHA-256: e9d315e162a8c0f82d758ad7639158b1782be31bce3224763e0ef4c7dc6e9981
font_01_sfnt_off000106bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106BD 10968 bytes
SHA-256: a10209fcde38a9985f9feec5db92407807a9c74574574c975095e536de038f33
font_02_sfnt_off00012016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12016 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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