Malicious PDF — malware analysis report

Static analysis result for SHA-256 014605d95b6b2532…

MALICIOUS

PDF

348.4 KB Created: 2021-06-29 13:15:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 50dc0444ee26ea741858b2347c76bdd8 SHA-1: 4f4a48500edaaa1e84f2f16102cc4f7f9561ffcc SHA-256: 014605d95b6b253205df5a9d9b77868b9e746ac7c44a1e11613b605590eb6564
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple PDF files hosted on compromised websites, indicative of a phishing or malware distribution campaign. The ClamAV detection and ML classifier strongly suggest malicious intent. Although no scripts were extracted, the presence of external links and the nature of the heuristics point towards a phishing lure designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9778

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://ludifrance.fr/userfiles/file/tujimowegibijemo.pdf In PDF document text
    • https://cardion.dk/gfx/fckimages/file/xotizevorazofogeweg.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/c52b764beaf727c271ed3e14204f003f/bibakobogaxatazojuba.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/fulegewifusafijaba.pdfIn PDF document text
    • http://apnorajasthan.net/userfiles/file/79163829493.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607031dfb7eef---93798739954.pdfIn PDF document text
    • http://cck-brno.cz/ckfinder/userfiles/files/fiwezegad.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2736542991---gaxaxote.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/7iafm5nv5c7oqt3kcuromih7f0/56464957657.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097abe807b04---nobin.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160841e0e936e4---gazexoz.pdfIn PDF document text
    • http://studioassociatoemc.com/userfiles/files/fotarusosimaxubejared.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/lcc4uq400r7m10mkj2k4ol9pkg/51885897143.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cc26a89cbcb---98964864262.pdfIn PDF document text
    • https://anup.bo/images/files/jimeterisadufezen.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ab418be6769---73123087476.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609e0cd21cbc4---kositobusokejud.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/3d64fc1a67e72d7ebce2dd438d767d87/50982090838.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e235f6e6bb---37609028111.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d25f440f48---jajilunixajozukavixenava.pdfIn PDF document text
    • http://dzbnf.com/upload/file///5529291644.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1606d543aa400c---sikato.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ad2b8e84c70---sukivejupolapiliwusulik.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607473206b485---67254509381.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=i+look+for+john+proctor+that+took+me+from+my+sleep+and+put+knowledge+in+my+heartPDF 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_off0004f2d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F2D2 23664 bytes
SHA-256: 242e763d34bf619e2f4c0c2fa4bb3f61093211b20d44affbb7c1e632b2a800b1
font_01_sfnt_off00052fbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52FBD 11540 bytes
SHA-256: 1afb096a1d12e8fa5d8f1bca7ce9753769a891ba5fc56df27786c305158a9fb0
font_02_sfnt_off00054ac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54AC4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1