Malicious PDF — malware analysis report

Static analysis result for SHA-256 76adf3dcb7444d00…

MALICIOUS

PDF

70.8 KB Created: 2021-09-17 08:32:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9630e9b55dda48aef78b5c0781ffe4ab SHA-1: e5c36ae77b6a67c6ace33918a3a6839a86c6be22 SHA-256: 76adf3dcb7444d00532868ed63b01871413a4efcc3a7028cc761d553141dabeb
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users to malicious content. The presence of a raw IP address in one of the URIs and the ML classifier's high confidence score further support its malicious nature. The ClamAV detection as Pdf.Phishing.Trojan suggests a phishing or trojan distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://inwebjor.ru/uplcv?utm_term=freedom+app+hack PDF link annotation
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1613deb288d50e---forutezinitog.pdfIn PDF document text
    • http://www.srijonihealinghome.com/fckimages/file/zarakavivirojekives.pdfIn PDF document text
    • https://ptogel1.com/contents/files/94295995086.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/3832305125.pdfIn PDF document text
    • http://feldbach-tourismus.at/files/jupuvisuwij.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/jmdqounnbioetd03hd1mi9mau4/31983278587.pdfIn PDF document text
    • http://telegid.tv/userfiles/files/7348581001.pdfIn PDF document text
    • https://pushtypathshala.com/demo/aims/files/images/files/duduxulapaj.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/dizujixuvusisuribanojima.pdfPDF link annotation
    • https://www.weboonline.com/ckfinder/userfiles/files/1232271624.pdfIn PDF document text
    • https://christianklein.eu/Quansis/ckfinder/userfiles/files/xuforonigomudiru.pdfIn PDF document text
    • http://kzlo.pl/fotki/fotki/file/62916899622.pdfIn PDF document text
    • http://hutnia.pl/userfiles/file/8820093189.pdfIn PDF document text
    • http://seanmore.com/userData/board/file/21624167682.pdfIn PDF document text
    • https://fond.ru/userfiles/file/dijupikodozavisa.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16140ee4f1025a---gakolatukixipogonuz.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/e4de49da98ac78422ef6ba739c139b49/fopowox.pdfIn PDF document text
    • http://generaltubi.com/container/ckfiles/files/17790686658.pdfIn PDF document text
    • http://cephedanismani.com/images/pages/file/50911254998.pdfIn PDF document text
    • http://systempro.kr/userData/board/file/viwesosasomumubodaduku.pdfIn PDF document text
    • https://go2germany.ru/files/file/75502794526.pdfIn PDF document text
    • https://kaptenhoki.com/contents/files/fipadulufaw.pdfIn PDF document text
    • http://cyc.cz/pictures/clanky/files/dasizidaxiv.pdfIn PDF document text
    • http://vangphutai.com/images/uploads/files/meres.pdfIn PDF document text
    • http://schokozentrale.de/idata/66921833572.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_off0000b6fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6FD 10340 bytes
SHA-256: 46f0991304b44da1e350157cc0443c4ea76b1936aaed28db652e2745e535aad8
font_01_sfnt_off0000ce3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE3C 15804 bytes
SHA-256: 96713d61716e18b0f3c7ec83f8ef6fa74297079fdf1477186d97147a749781b2
font_02_sfnt_off0000f636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF636 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1