Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eea08813b51b111…

MALICIOUS

PDF

79.8 KB Created: 2021-09-11 12:35:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e5e320cfed8863810a533901b923f147 SHA-1: a2e0c790c1c86b8a579cf226d3ebb9dc714810a1 SHA-256: 1eea08813b51b1115e4e91ab5c7ad4ad48ab99337adf124b86dcbe32d9f25ebb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a high density of embedded URLs, many pointing to disposable domains, characteristic of a link farm used to obscure malicious destinations. The presence of numerous unknown URLs suggests an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 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 http://groupementpecheduloir.com/ckfinder/userfiles/files/24370206353.pdf In PDF document text
    • https://penmypoem.com/new/admin/uploadfiles/file/52275379969.pdfIn PDF document text
    • http://chayka-svg.ru/files/47922423403.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/munafinanunikenelezu.pdfIn PDF document text
    • https://ecohort.info/userfiles/files/mibulisu.pdfIn PDF document text
    • http://kozszemle.hu/uploads/files/45712385091.pdfIn PDF document text
    • https://afayl.com/userfiles/file/raxogedonekurani.pdfIn PDF document text
    • https://sitycare.com/FCK-UserFiles/files/55890885503.pdfIn PDF document text
    • https://osakaav.com/userfiles/files/44035510384.pdfIn PDF document text
    • https://danielfelber.ch/userfiles/file/64809504777.pdfIn PDF document text
    • http://cgpreceptor.com/ckfinder/userfiles/files/regif.pdfIn PDF document text
    • http://hangquangauto.com/files/gujamimigesejojafimuxoti.pdfIn PDF document text
    • https://sharjahcements.com/images/bulk_images/files/86144576176.pdfIn PDF document text
    • http://vizit-k.net/uploads/editor/files/wafasupa.pdfIn PDF document text
    • https://termoformat.md/img/files/mimivaxuxinewev.pdfIn PDF document text
    • http://webinaris.training/ckfinder/userfiles/publics/files/devakonoba.pdfIn PDF document text
    • http://nprofit.hk/userfiles/99762581570.pdfIn PDF document text
    • https://bfull.ru/uploads/files/begogugixuneniz.pdfIn PDF document text
    • http://canadanur.com/resimler/files/ligotovalas.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/2caad08426b81a2fd4b55475e06433c0/laxefetanekolebimajof.pdfIn PDF document text
    • https://xinpayflow.com/ckfinder/userfiles/files/3220674554.pdfIn PDF document text
    • http://npi-management.org/ressource/site-image/files/96049678240.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=fun+online+games+on+phonePDF 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_off0000d509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD509 10576 bytes
SHA-256: 170aabc80b26ab84ee24ed209dcb6aa05405cc9a1252135c5cd6008ed0afd6e9
font_01_sfnt_off0000ece6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE6 17468 bytes
SHA-256: 8707881cf9a856d4b3047ffbc9288032d3e139bf60e34ac6286b7f34984364ac
font_02_sfnt_off000119a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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