Malicious PDF — malware analysis report

Static analysis result for SHA-256 2969f57f05f1d7b4…

MALICIOUS

PDF

71.8 KB Created: 2021-09-06 03:24:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2507a4bc9b8752170511164ae0bc147c SHA-1: 969350408e117aaada51e23347cadd563d7b1a85 SHA-256: 2969f57f05f1d7b4aa09f809f686226a87420fdbb2424284cdc3c9ced819995d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains numerous links, many of which point to compromised websites. The ML classifier and ClamAV detection strongly indicate maliciousness, likely for phishing or distributing further malware. The PDF structure and embedded links suggest an attempt to lure users to malicious content via a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/97159c3b6e87b1b935a11633dd7e1cdf/bezumadowusizemuremili.pdf In PDF document text
    • http://fw-simple.com/uploads/files/zujebepokapekivul.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/u42iqbpceblnevf2gj0k81ad93/wijajafejuxazag.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb3b484ffd---wutap.pdfIn PDF document text
    • https://activepymes.com/pub/file/40670916106.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd46f65c8a0---56120084809.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/12ee2b29d7fec463a4430e24aa49a841/takotola.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607951d14b174---tatuwoweverafipitevefoj.pdfIn PDF document text
    • http://modern-pro.ru/files/file/sejutifo.pdfIn PDF document text
    • http://fullx.net/files/82140370503.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160708d996c37f---segakilajikipowarenamusu.pdfIn PDF document text
    • http://naturalmis.com/userfiles/file/18092696004.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/xirivukefaregeviwok.pdfIn PDF document text
    • http://ecoaga.com/documentos/file/54812770684.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/b4d4501499e7c2a0e3bd7c289786dca4/polunuzur.pdfIn PDF document text
    • http://blissworldbeauty.com/newerac2c/userfiles/file/45644880157.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///solunobova.pdfIn PDF document text
    • https://chiuman-hk.com/images/file/81961173681.pdfIn PDF document text
    • http://dentalcenterstudio.it/userfiles/files/22854266961.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c76cb5e1434---27891784977.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/16674e83dd9feede3288ea904830df15/gunumeje.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/0kagcc2rltfqssru6ckdj3588b/93622290364.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/0mq89o4eq1pdr0a283suobe6jv/84182897128.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=lobulo+frontal+anatomia+pdfPDF 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_off0000b8a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8A2 10556 bytes
SHA-256: 0d87ef718608d940b5f50a1d7b1c71456f0eada71aad40ce978513dfaa7be5e7
font_01_sfnt_off0000d05e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD05E 16120 bytes
SHA-256: 39de7fe8ad2543de642af986b4167a405e008384f018906de68e03f08eaa017a
font_02_sfnt_off0000f97c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1