Malicious PDF — malware analysis report

Static analysis result for SHA-256 d15f5ae54cfa4bce…

MALICIOUS

PDF

72.8 KB Created: 2021-09-04 19:30:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: f16e18efb9b1f26c0cfd942acf9f093b SHA-1: 71e25982d9177a84297ca1fa12985e97d33e8a2c SHA-256: d15f5ae54cfa4bce180e6577f2ed0b8fa84f2231f874b4b31bdf4a63cff83edf
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9885

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://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/42846e78befb6e7d50923bcdea70e62b/tejororukutamekagije.pdf In PDF document text
    • https://bouwservicewinthagen.nl/userfiles/image/file/43818919715.pdfIn PDF document text
    • http://inter-travel.hu/_user/file/71458687209.pdfIn PDF document text
    • https://cheeselicious.net/UserFiles/file/26225784640.pdfIn PDF document text
    • http://m2mus.ca/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/84871380401.pdfIn PDF document text
    • http://www.gesas.it/media/mailinglist/file/lotamekesimewigarikupuz.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc743f03ea---xavesezaduralejax.pdfIn PDF document text
    • http://yer-krasnodar.ru/ckfinder/userfiles/files/57836542544.pdfIn PDF document text
    • http://es-hanasaki.com/yamituki-n/uploads/files/rudinejadagex.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210830011901346.pdfIn PDF document text
    • http://wellfoto.cz/pictures/files/zoxadaxat.pdfIn PDF document text
    • https://zoorichi.com/temp/fckeditor/file/pusekerepejawew.pdfIn PDF document text
    • https://taxforce.nl/userfiles/files/18329204813.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160943cc564e32---16787335313.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1611a36cc4ac8d---94313271728.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16070403139cee---sisote.pdfIn PDF document text
    • http://reichspfarrer.sk/file/89600084205.pdfIn PDF document text
    • http://crimesla.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jarezupubutudefikazu.pdfIn PDF document text
    • http://www.vnv.nu/admin/library/ckfinder/userfiles/files/jifotixexuvamunezujedek.pdfIn PDF document text
    • http://geyikkimya.com/userfiles/upload/file/julokuvedavesowuxoxuru.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bc5bacc006---pifas.pdfPDF link annotation
    • http://dcbestwings.com/uploads/files/midodijejev.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/ktlpk52spc73mpvnkj23346h7d/64483475664.pdfIn PDF document text
    • http://flyingkirin.com/uploadfiles/file/281035227308.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee2d5e718f---tigodiz.pdfIn PDF document text
    • http://maszyny.pl/userfiles/file/livolinonuw.pdfIn PDF document text
    • http://desagresbrts.com/clients/34568/File/ligoberekofoxurosabuvufud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=culligan+medallist+series+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_off0000bb69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d37b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD37B 16216 bytes
SHA-256: a3ccb50972945b2976e4ed9a11af7719f62f55b86b1a410e075233b804d628e6
font_02_sfnt_off0000fd86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD86 10600 bytes
SHA-256: 712d7d4f3572725851289fb3fd8a13a7c0a1e3f85db5fd769d7afafaee2510ff

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