Malicious PDF — malware analysis report

Static analysis result for SHA-256 07a43e6d50d45571…

MALICIOUS

PDF

81.9 KB Created: 2021-08-15 16:16:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9074162d4d5888a4187ab97ebe8debab SHA-1: 70f9ed9240c3cf38bef0983d0f89b5175669cba1 SHA-256: 07a43e6d50d45571f177488b7ee28c4800f45a15a2881a5b86512124f22aa47c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of 'utm_term' parameters in some URLs indicates an attempt to track user engagement with these lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://coretry.ru/uplcv?utm_term=fixed+short+term+employment+contract+template+uk PDF link annotation
    • http://microcement.ua/userfiles/file/35303645752.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/fj9o6tjppctsq64ai0kh1q7la3/rukuxakulalasanes.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/161184a1f1a895---75228175769.pdfIn PDF document text
    • http://studiocalcinoni.com/userfiles/files/66379566619.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/dvellh678r4b3urgeunm4pgqs7/17581963379.pdfIn PDF document text
    • http://studiomanzella.com/userfiles/files/wufiruwipikalawepujogi.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/160f6faf55a9d7---degozujoze.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/8fcfa0f2bc408e00daa1970065ee2d14/zonimeti.pdfIn PDF document text
    • https://inverpalmas.site/aym_image/files/wiwusurizowiredaku.pdfIn PDF document text
    • http://suachuaspa.com/upload/images-content/files/27996060309.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16075a074dc85c---56831981596.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/ec3671dcb96f67e9be16edbf51f9c8b8/53416255331.pdfIn PDF document text
    • https://lederstuhlshop.de/ckfinder/userfiles/files/5087719282.pdfIn PDF document text
    • http://dintainoodle.com/uploads/files/77573142349.pdfIn PDF document text
    • http://thuexedanang247.com/uploads/image/files/kenemidokudavuzodilezub.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d11a443274---gigepanuxoraxowikufexira.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7450180610---78178487832.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/df3aabd0c44d50fceffd6b2b3cf5f9f4/xamenodevo.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/8680e64bd8371f97029db168ff7f812a/kefufalagapijikuposuwomem.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160a6067a1561c---rininadusud.pdfIn PDF document text
    • http://naturallabs.de/userfiles/file/vuxuweniwapoxilefi.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/c9a1a9a4d0edb28b016e263ba89675c8/60567212945.pdfIn PDF document text
    • http://gymostrov.org/gymostrov/userfiles/file/gumorileruzozudosuki.pdfIn PDF document text
    • 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_off0000ddb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB5 16228 bytes
SHA-256: 9b34ec6d42bdaa419550b5e9ae2e65469ec54ba9ea22f54acfcaca90a903e425
font_01_sfnt_off00010796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10796 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011fad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FAD 11164 bytes
SHA-256: 10c1f2f5e3b50a542b5fba08f1f38e84e0961c533c77f8349bde20b18c366d61

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