Malicious PDF — malware analysis report

Static analysis result for SHA-256 2542e3c2c932c264…

MALICIOUS

PDF

100.3 KB Created: 2021-06-27 09:37:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 340b0622db3e78040a8818ca71ff2ec1 SHA-1: 979c970b6efa44876deed2d60532089beb53d6ff SHA-256: 2542e3c2c932c264ff6654eba215e2b4c7d0d9a00c04ae4e4f2809cc7b07a42c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, pointing to numerous distinct hosts, many of which appear to be compromised CMS upload directories. The primary purpose seems to be redirecting users to potentially malicious content hosted on these sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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 http://tasarimak.com/ckfinder/userfiles/files/misexor.pdf In PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/s1pmljjnhk5phe4hamuft5r8gh/39613612316.pdfIn PDF document text
    • http://hollandunitedreunion.com/clients/5/52/52f3fdf721cdccceb566e47094f1d9de/File/32495638879.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a1ffcf242---dajututizefotapiki.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9ca40ad2fe---sekawapibozogarupunofomib.pdfIn PDF document text
    • http://koreaseals.com/ckfinder/userfiles/files/67696174025.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/64641464579.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a2da61124f7---57242622356.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc913d5727---23543260959.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607439545f052---48613060224.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/899e132dc334070f0dc496294cc94821/befezigaxiba.pdfIn PDF document text
    • http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/12525027435.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/vf96nhlqlfubbb1ctnsvt2ast3/tazitefipufosunafiletid.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac155fe4b99---rizobelofobisikidarolivo.pdfIn PDF document text
    • https://ssvacancy.com/ckfinder/userfiles/files/xobiwibedoxovafus.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/25231403798.pdfIn PDF document text
    • https://waroproject.com/file/3058574770.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/abut1k2sv533015p52i8vn2ei1/jewivozalig.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/1f970f646f2d42e66f70da3b090256fe/gigulomi.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872c25bc868---92062568741.pdfIn PDF document text
    • http://quatanggiabao.com/images/uploads/files/81976565618.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce6246c26e5---ziviwotu.pdfIn PDF document text
    • http://bukharaalpharetta.com/sites/default/files/file/34169239174.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a998186b43f---baruvebatetaraniwilap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=hagia+sophia+purchased+by+sultanPDF 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_off00011d69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D69 11140 bytes
SHA-256: 1d30c31851035f889c8e0f6fb64d8ee632790bf46b85a2a17060123e324d08ef
font_01_sfnt_off000136ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014eff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EFF 21128 bytes
SHA-256: ed174e5bcd5b5bd3a8df60a8ada9cfa56c23d84b4170a8aea2aa2fbf6a123e21

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