Malicious PDF — malware analysis report

Static analysis result for SHA-256 d744a49c369b7959…

MALICIOUS

PDF

88.3 KB Created: 2021-07-30 12:31:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 69d8a1e0df57f0ee9f8fb6a56030ec4b SHA-1: 0e807676fe193e61945997617fc197cf8e0d28ec SHA-256: d744a49c369b795945857c300b594d65b5e31af7c448d52cb8088ae94c16b904
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to distribute further malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a downloader or redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://aduanaldelvalle.com/userfiles/file/matamarubexowavibe.pdf In PDF document text
    • http://stressmanagement-karriere.de/userfiles/file/73381696611.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609db871c70b0---61823970822.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16093f6d100ee5---19232903070.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b3b561f09a7---57869832240.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b9ba2bf00c3---suvaxososa.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/c5f99a6bf2e5ae872d6f562cc312c643/tigibetopode.pdfIn PDF document text
    • http://csc0512.com/userfiles/file/20210624060054_vhyndc.pdfIn PDF document text
    • http://abwingsde.com/uploads/files/gixesubijiveputuwune.pdfIn PDF document text
    • http://energo-winstal.pl/userfiles/file/netuzajogetejuworurulewa.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/bijevuzofevuva.pdfIn PDF document text
    • https://baohohoanglong.com/userfiles/file/xivul.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c09d9b4132---22731840801.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/c72304ea2a0a4641b196387c7b491a7b/jerezedidajanafozeveziwer.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/61305242910.pdfIn PDF document text
    • http://gancza.pl/userfiles/file/13031327297.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d60160bc7b---36297788062.pdfIn PDF document text
    • https://www.tanyadantus.com/wp-content/plugins/super-forms/uploads/php/files/e373ecacc71c7d28052a5f611ca2ffee/7114299404.pdfIn PDF document text
    • http://demenagements-remond.fr/userfiles/file/20210722014326.pdfIn PDF document text
    • http://cathugo.de/res/wysiwyg/file/volinixiro.pdfIn PDF document text
    • http://capital96.com/userfiles/file/javazur.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/66004900893.pdfIn PDF document text
    • http://dalnoboy.org/data/filestorage/upload/files/wifemavejo.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/52026419305.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16072682b4aa00---newimebupu.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/s2e6e7rjdjst4it0hjrukjr83l/kagapowixujikenuwafi.pdfIn PDF document text
    • https://ta-taiwan.com/app/webroot/userfiles/files/bujirusaliwol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=ebola+the+plague+fighters+worksheetPDF 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_off0000f333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF333 10932 bytes
SHA-256: ad8f1cc305b6beb719d414064ae43591dcf8e9f255c4555efa8f8db7d08a8b10
font_01_sfnt_off00010c89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C89 17528 bytes
SHA-256: 4e38e924b3067b2c492e01331dd47fbe99af43f2518ba968756d191c3315cbb2
font_02_sfnt_off00013a05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A05 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.