Malicious PDF — malware analysis report

Static analysis result for SHA-256 75a729c05d6e5ed0…

MALICIOUS

PDF

80.2 KB Created: 2021-08-30 08:07:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 122100aad10aea513789414242af25a0 SHA-1: 93017076d72fe028f7faebd6e222eade0d722ea7 SHA-256: 75a729c05d6e5ed09ba6181130ca7bf20b1fe9a81bd127826d841b0646e8045e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The primary purpose seems to be directing users to potentially harmful content, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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=best+town+hall+level+7+army PDF link annotation
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/6158ff54cc3b98b3fc824350fbd37cc4/lusulojuna.pdfIn PDF document text
    • http://elcwma.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/49642799685.pdfIn PDF document text
    • https://lazdynumokykla.lt/userfiles/file/89258524115.pdfIn PDF document text
    • https://littleitalypizzany.com/nbloom/fckuploads/file/76097999843.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608f111dcb772---porajagusumatijuzavu.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1611c0d0c5f059---88845056905.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/450bdd7ead6cae6845551b71857e14ce/xegeta.pdfIn PDF document text
    • http://aven.su/userfiles/file/reneri.pdfIn PDF document text
    • http://sumtinathholidays.com/admin/uploadfiles/file/lisujinegivodiro.pdfIn PDF document text
    • http://muaah.ca/userfiles/files/nafusufowiwusuvasosin.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c292ae0a27c---11375978704.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/k6ghs5dq44a3im6m9l6n6lmguh/91798903866.pdfIn PDF document text
    • https://childprotectionindia.com/lexcyberia/userfiles/files/15899820187.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/0aomuqut56vqnu24nmki60ake7/virexolivifananuwuma.pdfIn PDF document text
    • http://szkolka-wiercioch.pl/files/file/61333465994.pdfIn PDF document text
    • http://steps4cancer.org/clients/a/a7/a78c374070a178914b502abaf3db82b8/File/40213630391.pdfIn PDF document text
    • https://systematix.pl/userfiles/file/30429617007.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087d8e045505---23260345880.pdfIn PDF document text
    • https://synersys.fr/contenu/file/dedinodoxape.pdfIn PDF document text
    • https://sahyadrisevasanstha.in/userfiles/file/38964287024.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/konuwugodetudupi.pdfIn PDF document text
    • http://cuacuongiare.vn/upload/files/15350183137.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c7bd2536563---77566305109.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16090bc109271a---22669649515.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_off0000d650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD650 16996 bytes
SHA-256: c5a26cbaa27e5debdef497f355ec6b051e09fe32509625955ee2e3cfe75f4a9c
font_01_sfnt_off0001023f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023F 10648 bytes
SHA-256: 1059edc08e0bf49bd396a4eed0c94a9b4adbbb47f93d85b4355ea2df9269793a
font_02_sfnt_off00011aa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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