Malicious PDF — malware analysis report

Static analysis result for SHA-256 5462ba9153a664a0…

MALICIOUS

PDF

69.3 KB Created: 2021-09-27 14:49:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 09dfc86096b1f2907a445cf33f0ded6f SHA-1: 1ed92648f2819755afd49d415d48f51addba1db8 SHA-256: 5462ba9153a664a0c8f89e6e394395f92b0749bfc71620d6f742969899ebf1a5
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-only nature and embedded clickable links. The heuristics indicate it's designed to trick users into clicking external URLs hosted on potentially compromised websites. The presence of numerous links, many pointing to disposable hosting or WordPress upload directories, suggests a campaign to distribute malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://philabc.ru/uplcv?utm_term=tales+from+the+indian+jungle+pdf PDF link annotation
    • http://ciarajewellery.com/editor_upload/file/kedodusu.pdfIn PDF document text
    • http://glampingcaravan.com/userfiles/file/20210905083647.pdfIn PDF document text
    • https://fishuntpesca.it/file/xepepisafusupibekoxukajer.pdfIn PDF document text
    • https://parlagame.net/calisma2/files/uploads/87398844701.pdfIn PDF document text
    • http://newdimension.su/userfiles/file/44129360966.pdfIn PDF document text
    • http://abbuffalowings.com/uploads/files/mipaxavisimogara.pdfIn PDF document text
    • http://wwsm-us.com/files/file/20364921955.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612f52306630c---givuwexiwivivo.pdfIn PDF document text
    • http://myflora888.com/ck_files/files/runuzoxekuzadokogolirim.pdfIn PDF document text
    • https://shinko-tw.com/UserFiles/file/58102011970.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615107dbed231---29524361170.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/161442b72c2e9b---lamixagejiwa.pdfIn PDF document text
    • https://bcm.es/files/galeria/files/repawevugujefexofadi.pdfIn PDF document text
    • https://hyundainhapkhau.vn/upload/files/degemetiretilusizagozap.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c8906483d9---tebotexipawepomofuxata.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614f19caa53c2---rodutabimumiguje.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/27126157190.pdfIn PDF document text
    • http://parbatsamajjapan.com/img/files/files/xupataliwe.pdfIn PDF document text
    • http://creptiles.dk/userfiles/file/tujaludisuxodasede.pdfIn PDF document text
    • http://ailizia.com/userfiles/2985962730.pdfIn PDF document text
    • http://vetportonaccio.it/userfiles/files/4393151098.pdfIn PDF document text
    • http://rideabikenews.com/user_img/files/kuvulujigazewiwaro.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/161473582a13fe---vosibosixujota.pdfIn PDF document text
    • https://auditorescr.com/ckfinder/userfiles/files/xekeliladabureso.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_off0000b382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB382 13868 bytes
SHA-256: 6bc58780b970463e291cb6fdbe3c626c5986535ea6b0fced7c72940e8d5be278
font_01_sfnt_off0000d5bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000edd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD4 11140 bytes
SHA-256: 7cc5e28d87d9d8ddd128e5258dc7d68618daafc9614070dd66bd86601d9e782c

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