Malicious PDF — malware analysis report

Static analysis result for SHA-256 096676aee2dd2459…

MALICIOUS

PDF

76.5 KB Created: 2021-09-20 13:29:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: eefda8cf68b7013009c65860bcd15100 SHA-1: d3b4d27f61db93cd4992738bcdb4dcc695686a78 SHA-256: 096676aee2dd245951ca45a1faa40f5ed7d7b7a9dafaef81d2f6f0845f5eee9c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The file's structure and embedded links indicate it is likely used as a lure to distribute further malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://pistant.ru/uplcv?utm_term=indigo+light+wavelength PDF link annotation
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/2b917c62974753d50a9c7d6ebb98fe13/42765631391.pdfIn PDF document text
    • http://sahcarpets.com/userfiles/file/8573514190.pdfIn PDF document text
    • https://projektovanje.info/userfiles/file/tidezupagewuxanuduxadibu.pdfIn PDF document text
    • https://mokshadhamnepal.org/userfiles/files/80640130869.pdfIn PDF document text
    • http://eclickapps.in/userfiles/files/kojelezositobi.pdfIn PDF document text
    • http://ylpcl.com/ckfinder/userfiles/files/48361185435.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161369a59ba119---67893866071.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138fd8f98061---wekizepuvegekekefu.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612fa6c10bbc1---84023759814.pdfIn PDF document text
    • http://aquitaine.annuaire-regional.com/ckfinder/userfiles/files/sowomoju.pdfIn PDF document text
    • https://sunnyrosesschool.com/userfiles/file/fobefokiluzirotunanufiwi.pdfIn PDF document text
    • http://osc-pribor.ru/products_pictures/file/57925759788.pdfIn PDF document text
    • http://taiwan-tsai.com/upload/files/negesuwepojetoxu.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/07d5abb10148dd62abd67e014beca252/pitigujavuxemujip.pdfIn PDF document text
    • http://suurelepa.ee/data/file/livopoxe.pdfIn PDF document text
    • http://lnv-cnc.gr/userfiles/file/79845858949.pdfIn PDF document text
    • https://hotelite.in/userfiles/file/foroba.pdfIn PDF document text
    • https://abisspaandboutique.com/nbloom/fckuploads/file/vupexipison.pdfIn PDF document text
    • https://printsolutions.ro/uploads/wysiwyg/files/vazaxipewupedujidepebel.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/46af2a339608bf36c5a06f6af41c9829/80835979282.pdfIn PDF document text
    • http://scandirent-new.ru/uploads/assets/file/gebewido.pdfIn PDF document text
    • https://ekinyalitim.com/depo/sayfaresim/file/wekebajuwogelasonagomiwo.pdfIn PDF document text
    • https://funbugs.ie/userfiles/file/16094724286.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_off0000caa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAA1 16704 bytes
SHA-256: bf839db563deeb5d8a1d40e1f1cf37aa54875bb3c0a2a848330f7a391b8c2637
font_01_sfnt_off0000f5a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A1 10360 bytes
SHA-256: d645afe2e72c772efa61f5b5bf357052046ef51fdfc911be8b4c9d639fed24d3
font_02_sfnt_off00010cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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