Malicious PDF — malware analysis report

Static analysis result for SHA-256 9503be321260a251…

MALICIOUS

PDF

83.4 KB Created: 2021-08-12 16:43:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 191294c95e9e9678d538d590e01d4455 SHA-1: d1b0627752f3b168b6de4dcdbc8036e993da6ca7 SHA-256: 9503be321260a25105b6c6a6771af43184b7e9bef177f85590d5b9cf95f80adf
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or download further malware. The presence of embedded JavaScript suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://immopolignano.lu/images/ginikowetaketo.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b27ade48768---sububiwekasafatemedutu.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/e3b6e21d1a9338f152fa11bed0b19f6f/ronugav.pdf
    • https://imad0c0.com/js/ckfinder/userfiles/files/5913956284.pdf
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/4896fc73781817a1b8700468ca69b84d/wixizepok.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/uk2mjdlimk9homd9m2su32amd3/2980171301.pdf
    • https://tch.lu/files/files/50562637357.pdf
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/e8f07ac28128c4705974e4f902968bde/54571573832.pdf
    • http://ucinnovation.ru/admin/ckfinder/userfiles/files/pavofozuvovadirapetapafoj.pdf
    • http://balmybnb.com/t/tutorfirm/uploads/ck/files/91083375381.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2aa00fce6---49016599223.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a75e26c3883---28870218297.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160867676f23a6---19567181019.pdf
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160844ded41249---19364246379.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f82b6a8c1---88205055131.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/04f7e870569670f813bc652dc280283f/30075733527.pdf
    • http://triatlonbizuterie.cz/sites/default/files/file/mopifufofumejax.pdf
    • http://maristaslardero.es/userfiles/file/80693018605.pdf
    • https://ubranni.com/uploader/files/petutetenolazezivoxez.pdf
    • http://net-marketing.hu/images/files/4550534922.pdf
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/011c56f80d10b612c5fa01aedab6b93c/65876589421.pdf
    • https://bnbcostaverde.it/userfiles/file/tanuxepalukegoxovefodonol.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0c611d81e---zevefesurozibevuj.pdf
    • http://eternoohydro.com/d/files/dunesakuvijinogoloxi.pdf
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2dcb210cb---zawinuzosegapaboraviw.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=can+i+track+my+phone+for+free
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e403.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE403 16792 bytes
font_01_sfnt_off0000fc1a.bin
8abadb6094f584be4c4a8cfb356fbcc0a4c6773830119d1dbf6f134334088bb7
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1A 10768 bytes
font_02_sfnt_off000114c2.bin
968bb69bf168a8c49b3e5ddaf393b91388ae44353962051348b858ed1f31ce97
pdf-font-stream PDF embedded font (sfnt) at offset 0x114C2 16224 bytes