Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd4917a52d878ba1…

MALICIOUS

PDF

84.9 KB Created: 2021-09-20 12:06:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 26fd47bf379783182a0a296b7c76cba0 SHA-1: 3d3bcd69f7e5456c087b8a339c460f556c488277 SHA-256: fd4917a52d878ba169599548e37b1c4d39411542ce4efdbdc8f63b1e15b56d6b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a link farm pointing to numerous external URLs, many hosted on compromised or disposable domains, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious intent, likely serving as a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://egyptsuntours.com/userfiles/files/dudozuvofe.pdf In PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/78f7a4a139103a0eae464317e43c576d/fezexovediboreget.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/161365b9d0f8d5---nanowowuluta.pdfIn PDF document text
    • https://transilvaniafishing.ro/app/webroot/files/userfiles/files/23974747435.pdfIn PDF document text
    • https://strategieb2b.ca/userfiles/file/betopogurapikexa.pdfIn PDF document text
    • http://ubestsports.com/imager/files/20210912232131.pdfIn PDF document text
    • http://www.chubsorn.com/file/files/41057418539.pdfIn PDF document text
    • https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/tijexibebetepenu.pdfIn PDF document text
    • http://anael.fr/fckeditor/userfiles/file/96739374631.pdfIn PDF document text
    • https://vgcanada.com/userfiles/file/xokafolaxoweviz.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/lodafux.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/98280472066.pdfIn PDF document text
    • http://kfoodntea.com/dataroom/file/40808619207.pdfIn PDF document text
    • http://druckmaschinenservice.com/uploads/fce/files/tiputakezeze.pdfIn PDF document text
    • https://dmitrovka-zn.ru/admin/ckfinder/userfiles/files/98117388815.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161455c6dc2c34---bosorotuzisavorilusa.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc149d73a7---71443848293.pdfIn PDF document text
    • https://relaxbotanika.cz/ckfinder/userfiles/files/negeg.pdfIn PDF document text
    • http://mixline.ru/img/lib/file/veriritapisosupakejagom.pdfIn PDF document text
    • https://cuichi177.com/uploads/files/202109121131399340.pdfIn PDF document text
    • https://thuaphatlaihanoi.net/uploads/files/70218704673.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143b4df68f80---19920294683.pdfIn PDF document text
    • https://fwstc.in/userfiles/file/baxakazagefoferes.pdfIn PDF document text
    • https://lensmam.com/userfiles/file/39190861538.pdfIn PDF document text
    • https://barcelona-health.com/files/galeria/files/pufuwugabefikiruziwudefo.pdfIn PDF document text
    • https://cytairtool.com/test/userfiles/file/20210903_c03cd.pdfIn PDF document text
    • http://stoewebdesign.no/userfiles/file/45965765610.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=siege+up+mod+apkPDF 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_off0000e2de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DE 10484 bytes
SHA-256: 9fb745d5cbcbb56cd1c65a55fd92f5649611e1d895206473b457a7bdd7a3fa2a
font_01_sfnt_off0000fa87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA87 19748 bytes
SHA-256: 0476a0cf0892ec998f7f9d6d339c1a9f6b3fd3a7981854dffd877eb16fe69654
font_02_sfnt_off00012e37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E37 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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