Malicious PDF — malware analysis report

Static analysis result for SHA-256 d124ee33c7afb3ca…

MALICIOUS

PDF

83.3 KB Created: 2021-09-08 16:32:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f4b00094fae3e0f8bb4a344daae03fc9 SHA-1: 1df7d61e7da603a75d901c5ed3c3c580e7145841 SHA-256: d124ee33c7afb3cafc36c8edcdbbcceae2330e83ef193590cc110e12361526e8
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. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites and disposable hosting, designed to redirect users to malicious content. The presence of multiple links to WordPress upload directories and the use of UTM parameters suggest an attempt to obscure the true destination and potentially leverage SEO for distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/30be75d4de8e7b5985eaf4d425015697/66508341637.pdf In PDF document text
    • http://faradbox.pl/files/file/53003561820.pdfIn PDF document text
    • http://cctechlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/79218767138.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16131480e19641---rodezuriba.pdfIn PDF document text
    • https://orrizon.ru/images/file/25875705054.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/455783f1193d7d6665409367ad65b36a/42140912348.pdfIn PDF document text
    • https://zilalcooling.com/other_files/File/26670322258.pdfIn PDF document text
    • http://www.velkoobchod-man.eu/ckfinder/userfiles/files/jonixidolig.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161385feee45fb---wibewapawomu.pdfIn PDF document text
    • http://phrabat.net/UserFiles/File/3262134685.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/1fe77c2709e4ab6deeebdbbaec4726b7/46834020440.pdfIn PDF document text
    • https://endeligmandag.no/e-brev/data/div/ziserox.pdfIn PDF document text
    • https://kenadong.com/contents/files/watemiletiburukosozajebo.pdfIn PDF document text
    • http://broadgatecapital.com/userfiles/file/1706838879.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1613735b11b7ee---logikitev.pdfIn PDF document text
    • https://jecoexports.com/ckfinder/userfiles/files/mumuvodepagolox.pdfIn PDF document text
    • https://calendarsunrooms.com/userfiles/files/rakivo.pdfIn PDF document text
    • https://2b3la571ga-70p.com/contents/files/73112281620.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/tofalolinuvofu.pdfIn PDF document text
    • http://tv-kitchen.ru/files/files/40759204824.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130338590bf3---tolapumod.pdfIn PDF document text
    • http://khachsanmyngoc.com/upload/files/kexubane.pdfIn PDF document text
    • http://ecofincas.net/ckfinder/userfiles/files/14152572364.pdfIn PDF document text
    • http://pro-group.ru/userfiles/file/76447974106.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161333d9d40665---sexomopojobifamenivavebi.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16133606410826---30784285822.pdfIn PDF document text
    • http://puginternational.com/ckfinder/userfiles/files/29299643772.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=vespa+gts+125+service+manualPDF 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_off0000dce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FC 11040 bytes
SHA-256: 80b833462931f621f0fb69ac33ad89b972a78675b550a445700837e6b3553930
font_02_sfnt_off00010edd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EDD 18248 bytes
SHA-256: e24f509996013e429c1617a923ae860f8a6b04f5191ccde49e0a70096f6b8d02

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