Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5964a84cbd3279f…

MALICIOUS

PDF

69.9 KB Created: 2021-09-28 15:03:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 123719c90c2e8f94d2e090b93de1b893 SHA-1: 85728ed502e2fe76b4450404617d1ccec44cd34c SHA-256: e5964a84cbd3279fff9765365224e32751ac72b67d77c37812c3e9362bfeed91
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a link farm designed to redirect users. The presence of a lure related to 'gta sa lite highly compressed' indicates a phishing or malware distribution attempt. ClamAV detection and ML classification further confirm its malicious nature, likely serving as a downloader or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://laborke.ru/uplcv?utm_term=gta+sa+lite+highly+compressed+10mb PDF link annotation
    • https://maxlinder.com/admin/assets/ckfinder/userfiles/files/36075330318.pdfIn PDF document text
    • http://pegasomeeting.medcoast.net/ckfinder/userfiles/files/dorekusamiki.pdfIn PDF document text
    • http://mp-journal.com/media/file/43322856042.pdfIn PDF document text
    • http://jfac.kr/ckfinder/userfiles/files/riporipububusizilisibefun.pdfIn PDF document text
    • http://romovi.net/sgi_userfiles/userfiles/files/jumotupolesabonuzup.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eadc8608fa---lobugiwav.pdfIn PDF document text
    • http://orderbestwings.com/uploads/files/86125632442.pdfIn PDF document text
    • http://xn--80affcyoc0ac1f6a.xn--p1ai/admin/modules/ckeditor/ckfinder/userfiles/files/23881855449.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16146ea500e1af---tasijopufurewagexosun.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/72803218528.pdfIn PDF document text
    • http://elcivan.com/admin/UserFiles/file/99790083254.pdfIn PDF document text
    • https://aiaciran.org/cache/fck_files/file/51957384137.pdfIn PDF document text
    • http://schoonhovensvrouwenkoor.nl/ckfinder/userfiles/files/26964475318.pdfIn PDF document text
    • http://bestbelly.org/content/files/files/13252520569.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/fd129485df85f591714ea5ead76b7f82/85397064281.pdfIn PDF document text
    • https://marlschuz.com/userfiles/files/47861819625.pdfIn PDF document text
    • http://eachfun.com/ckfinder/userfiles/site_eachfun_com/files/48745473302.pdfIn PDF document text
    • http://sdds.be/userfiles/file/86953066664.pdfIn PDF document text
    • http://theloanwala.com/userfiles/file/93879997699.pdfIn PDF document text
    • http://emanuelmlevin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/puwajumixulus.pdfIn PDF document text
    • http://finara-v.com/file_media/file_image/file/54219107008.pdfIn PDF document text
    • http://bellina.pl/userfiles/file/soligebo.pdfIn PDF document text
    • http://schuetzenfest-hemeringen.de/ablage/userfiles/files/92995040286.pdfIn PDF document text
    • http://frchem.cn/upload/files/vazumuxuzulab.pdfIn PDF document text
    • http://optimaglobal.net/ckupload/files/luwofe.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.net/ckfinder/userfiles/files/10962559263.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://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_off0000b124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB124 11324 bytes
SHA-256: 958d1d2666b42eccdfdd2cbabdffcfd528ecc575a7a6511b4b7fb425a8cc1e66
font_01_sfnt_off0000cb65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB65 15200 bytes
SHA-256: e1cc1a0fd8d6fc97514a349bf0fe59795fabd50c084f2e7cc279c73b1c1ce99a
font_02_sfnt_off0000f1dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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