Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0d5f839852ef7d4…

MALICIOUS

PDF

79.8 KB Created: 2021-09-06 18:19:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b9ff98d5364bc72ebfe583aa802a29d0 SHA-1: db093ee379dbe0f4462731e36925a686db5dede0 SHA-256: f0d5f839852ef7d43c20e18ed7f6e0736c62f06057da413398614ec61b602b35
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URLs, many hosted on compromised or disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a phishing lure or a distribution point for further malware. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://irlanc.ru/uplcv?utm_term=bharat+gas+new+connection+form+pdf PDF link annotation
    • https://childconcern.in/trila/userfiles/file/fipafogulu.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/28721903543.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/161161f44bf9a8---kukovomubefubixosa.pdfIn PDF document text
    • http://xahuaheng.cn/userfiles/file/90581653959.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/dpa6hprqi3fdfe2elad12eaacj/65945924415.pdfIn PDF document text
    • http://nhsclassof77.com/clients/c/ca/caa0b9827732345dad94809623212052/File/91974656753.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/c881654678963a9f46b6cdb7dce31ff5/vizujejobikulifuwoninev.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/e25458a05883038247a50081d79428f8/kumafunodu.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/4719c46b0bf49c7017887149cacb4aa8/kakipe.pdfIn PDF document text
    • https://ncsccalgary.com/userfiles/files/49603394020.pdfIn PDF document text
    • http://cameralehiep.com/hinhanh_fckeditor/file/48934267003.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f27f92b9586---28158486642.pdfIn PDF document text
    • https://pristineleather.com/userfiles/file/52813411629.pdfIn PDF document text
    • http://taxilitomerice.cz/ckfinder/userfiles/files/bewiragem.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/8da870d0269625cc6a3eb32f80e296fb/61892459940.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/7930928200.pdfIn PDF document text
    • http://robbes.nl/media/files/kamategokurom.pdfIn PDF document text
    • http://studiopol.it/userfiles/files/60301354683.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/pos4ngqushcolufaem2v5hg9sc/velojenuv.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/napuxuterawikebowof.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/90dfe94091ga5s4nbpre7aqvti/xoxuwi.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/sl36scbhn3afnsffai9orp4122/zedubodabajewazuw.pdfIn PDF document text
    • http://archiwum.wyryki.eu/admin/ckfinder/userfiles/files/49944245759.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/jatapifokidebajezuwedowi.pdfIn PDF document text
    • https://galerie-louise.be/userfiles/files/suxixilowawetixi.pdfIn PDF document text
    • http://eschool365.in/js/admin/uploadfiles/file/95345415371.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_off0000d134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD134 17748 bytes
SHA-256: 953156a91059384f5aa042bd37db732e3c8aa42b6555df36e5a124eeeb6c0fea
font_01_sfnt_off0000ffc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000117de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117DE 11160 bytes
SHA-256: 5a2f4a26bc4ed8c4ce510511bfcea4c11aec3f1dc716729815bf7cdf1c016ec5

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