Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a6e2f9caa56f7b6…

MALICIOUS

PDF

87.8 KB Created: 2021-08-06 16:07:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 707ac41da2d30716a3d38f1346662e7e SHA-1: 10d3f435ab7211f0f114b1771fc8ae19c6d54526 SHA-256: 0a6e2f9caa56f7b6a865771badc8aac3e2c6f8ffb7f0c5c1800d7595707c5570
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 Pdf.Phishing.Trojan. The file contains numerous external URIs and is structured as a link farm, with many links pointing to compromised WordPress upload directories or disposable hosting. The primary purpose appears to be directing users to malicious websites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://coretry.ru/uplcv?utm_term=how+many+times+do+victoria+secret+models+workout PDF link annotation
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/3096985a5ff2210ae050d1334e71a283/puxilelofi.pdfIn PDF document text
    • http://chiengthai.com/file_media/file_image/file/vonixenivarufu.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/8b8b75a9be5abdc0c985bfb3f023e428/49927250474.pdfIn PDF document text
    • http://auksozvynas.lt/userfiles/file/58881781100.pdfIn PDF document text
    • http://smflow.in/admin/uploads/file/77384932078.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/71070713071.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4134a6cea---72608327184.pdfIn PDF document text
    • http://hanmih.com/userfiles/file/20210720190519.pdfIn PDF document text
    • http://gocep.org/data/userfiles/files/70412137365.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/30354700740.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5251f126a---budak.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/88920770926.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/nadererif.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16077f0d66bbb2---89918990035.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/miwalevamamuzudutesag.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/0e1ac61912febcae08d30ce846280b19/91036102623.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16085c07a7e3fb---40548755777.pdfIn PDF document text
    • http://bjallstar.com/upload/file/bamemomorutevil.pdfIn PDF document text
    • http://moristas.com/userfiles/files/56367824559.pdfIn PDF document text
    • http://yngc.ru/admin/ckfinder/userfiles/files/tidutedokiximawefaneke.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8308b8db6---98367465423.pdfIn PDF document text
    • https://narimasu-chintai.net/jcfiles/file/pawixozukiberefatofu.pdfIn PDF document text
    • http://basumati.com/app/webroot/ckfinder/userfiles/files/noleb.pdfIn PDF document text
    • http://mt-filtration.com/uploaded/file/155029449960f0e9e19d4d6.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_off0000f0db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DB 17460 bytes
SHA-256: bcbeefdd7cf968f5e684e0ecc10035b5a435d32b1c122d0dab72a3f230bdf1da
font_01_sfnt_off00011e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E63 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001367a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1367A 10980 bytes
SHA-256: fb3875fcc429a2b8e4d5a10f40c3cc42d2b3c66659556b79915140a431df4502

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