Malicious PDF — malware analysis report

Static analysis result for SHA-256 60a509ad494a526f…

MALICIOUS

PDF

87.5 KB Created: 2021-08-01 08:58:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 78b318c090f7fb958421da4e1615e0b0 SHA-1: 63bbe6e93099426bb9d796ab8c7706821d5afe93 SHA-256: 60a509ad494a526fa48210cc1bc26a27ad3b19c4cbc6f5d2f4697cde7912f125
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://classicalgardenornaments.com/uplds/file/wusedimagojobidevowibuj.pdf In PDF document text
    • http://alexanderkanevskyartgallery.com/clientMedia/file/mitenukolenafawabuguz.pdfIn PDF document text
    • https://xaydungdonggia.com/app/webroot/files/images/pages/files/leromokux.pdfIn PDF document text
    • http://ambvetsanprospero.eu/userfiles/files/lakofezusifimedovonefara.pdfIn PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/vamedanuxexe.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/7a93c55b289cfb0d82ad22e1fcd336da/32621821187.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16073d8485d0d9---fawomakifawuxutemukuxob.pdfIn PDF document text
    • http://citadelcaralarms.com/userfiles/file/boramute.pdfIn PDF document text
    • http://akvari-um.ru/userfiles/file/10512590824.pdfIn PDF document text
    • http://english-life.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160770755cd115---zawotikivuvaluzoxidig.pdfIn PDF document text
    • http://lezeckastenakosice.sk/upload/files/33349788398.pdfIn PDF document text
    • http://budka39.ru/files/93933404753.pdfIn PDF document text
    • https://www.movementmedicineassociation.org/ckfinder/userfiles/files/53516659227.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160df76f314dff---tapotuxogobujeribap.pdfIn PDF document text
    • http://novichiha.ru/pic/file/julesamuwufonojav.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/vjc8gph6vprc2oerl6i6jdiko6/30411675895.pdfIn PDF document text
    • http://planet-for-events.de/userfiles/file/dopedi.pdfIn PDF document text
    • http://kingcraftviet.com/uploads/ckfinder/files/naridal.pdfIn PDF document text
    • http://www.pibmg.com.br/ckfinder/userfiles/files/files/gefim.pdfIn PDF document text
    • https://rijst.nu/userfiles/file/tolimowizazav.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160924a1aad568---zixuwojumifaxubabobuku.pdfIn PDF document text
    • https://osakadentalcare.com/contents//files/noripawere.pdfIn PDF document text
    • http://chiron-ventures.com/chiron/home/img/upload/files/210729225729777767tp717.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=journal+ledger+and+trial+balance+problems+with+solutions+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_off0000f31d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B34 11384 bytes
SHA-256: 5a685afdcd79b6691a6457716937d1344471024da6df9f765c3c97129b4a7429
font_02_sfnt_off00012573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12573 16440 bytes
SHA-256: 65d676d78bf699df76fae710ccfbce3634768a12f7dc12cb651690e433f52c0a

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