Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d0db276f6dd199a…

MALICIOUS

PDF

88.0 KB Created: 2021-09-14 01:48:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5dc5d33129df06f364c4609e95ba7b22 SHA-1: c50494469ffa201a728b1aa6a3c3562e3c4f48ba SHA-256: 7d0db276f6dd199aadb74ae08cc5a644ae03c95b1ff4b3fda3808544f5770097
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristics indicate that the PDF is likely intended to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://smidgel.ru/uplcv?utm_term=phone+calls+not+coming+through+android PDF link annotation
    • https://pametnidom.hr/pametne_kuce/userfiles/file/rexixar.pdfIn PDF document text
    • https://nezrenweb.com/calisma2/files/uploads/99830904090.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613659902ca44---71564948499.pdfIn PDF document text
    • http://jmvlpslimited.com/ci/userfiles/files/fogonogodukabezebakojoso.pdfIn PDF document text
    • http://brmxn.com/userfiles/file/20210905112104_ssigti.pdfIn PDF document text
    • http://bennett-legal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fufivemosisad.pdfIn PDF document text
    • http://conelser.hu/fck_uploads/file/87502292932.pdfIn PDF document text
    • http://lica-mpt.it/userfiles/files/tadabasoduz.pdfIn PDF document text
    • http://dytac.hk/userfiles/41865051774.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16137c1c2358b8---85661071467.pdfIn PDF document text
    • https://livstyle.ro/home/livstyle/public_html/uploads/files/24566318631.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/71278a2900a870b917bab813e18a50c5/givusumakugawewogix.pdfIn PDF document text
    • http://pallenberg-busreisen.de/uploads/files/xorajativ.pdfIn PDF document text
    • http://mp-journal.com/media/file/62662361642.pdfIn PDF document text
    • http://fsgpj.com/upfolder/e/files/20210904060525.pdfIn PDF document text
    • https://namdolove.com/FileData/ckfinder/files/20210908_F84C921810A54913.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/e1592d806d63c407917a9751dd22b9fb/9156487117.pdfIn PDF document text
    • http://ge-mak.com/files/josubag.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/44983316878.pdfIn PDF document text
    • https://dailyiat.com/html_upload/file/65840926732.pdfIn PDF document text
    • https://its-bulgaria.bg/files/file/19223657304.pdfIn PDF document text
    • http://www.chubsorn.com/file/files/31605238091.pdfIn PDF document text
    • http://gryfarmerskie.pl/pliki_wyswig/files/bifakegu.pdfIn PDF document text
    • http://steelfurniturecn.com/d/files/63261438709.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed9091115c---bimijejobiki.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_off0000f4aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010cbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBC 17192 bytes
SHA-256: 67d86125a30862300fc4a93808291fe36ed44cfcba9214988d10e13eb9aeae4d
font_02_sfnt_off0001393a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1393A 10920 bytes
SHA-256: dc59c42c7abe2f5987489eec43b903b0d8ea59b3d75a016cacd4d89bb42043db

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