Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f0a9fda54d47a31…

MALICIOUS

PDF

72.7 KB Created: 2021-09-15 13:43:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 08eff27bd9fd07134a00a345872b5a00 SHA-1: 56a923a3c89054990ab8b815d2dbec9246d50441 SHA-256: 9f0a9fda54d47a31062d7809d6ea693d9b345ba71cadc1c0c1bfa83bf2ed167a
212 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains embedded JavaScript and multiple links to external PDFs hosted on various websites, some of which appear to be compromised. The presence of a 'download button' lure and instructions for password-protected archives suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://irfanmakina.com/depo/sayfaresim/file/ximeligubazexitekaf.pdf In PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613629d5e0197---76284402915.pdfIn PDF document text
    • http://e-restauracion.com/app/webroot/files/uploads/files/24885371413.pdfIn PDF document text
    • https://www.idd.no/ckfinder/userfiles/files/18124826387.pdfIn PDF document text
    • http://nagakuratrading.com/js/upload/files/galubazupokoziwaparalot.pdfIn PDF document text
    • http://aurora-c.jp/files/files/51701014451.pdfIn PDF document text
    • http://eastwoodfamily.net/userimages/sipobek.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/qd1isjpppij8s8q2dpmbq3m1m0/10787888093.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612eeea3b804c---52885755543.pdfIn PDF document text
    • https://sarvodayasamaj.uk/upload/files/33390215008.pdfIn PDF document text
    • http://lezeckastenakosice.sk/upload/files/95667896942.pdfIn PDF document text
    • https://zmiz.hr/userfiles/file/tosut.pdfIn PDF document text
    • http://highdeal.linkeo.net/ckfinder/userfiles/files/kowesadopajakape.pdfIn PDF document text
    • https://langumeistras.lt/i/File/27277801997.pdfIn PDF document text
    • https://firmabudowlanawalczak.pl/web/uploads/files/mijojapukovo.pdfIn PDF document text
    • http://amongelite.com/ci/userfiles/files/90377014421.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161327c6fa36c8---vezowurorunokubanuzusarul.pdfIn PDF document text
    • http://jilienjrubin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/panabodasasusuzodub.pdfIn PDF document text
    • https://radiosmile.hu/upload/file/dejoguwenef.pdfIn PDF document text
    • http://tw-tms.com/uploadpic/xw/files/44385312073.pdfIn PDF document text
    • http://1yunnan.com/ckfinder/userfiles/files/78000518145.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=asphalt+8+mod+apk+highly+compressedPDF 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_off0000b709.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB709 11252 bytes
SHA-256: faff2d3a0e5eefacfd00772a21419b0c698258792b3595ca5a7758368674d55b
font_01_sfnt_off0000d15b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD15B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e96d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96D 17176 bytes
SHA-256: 31a80f5d88a5dcb4f5e521e7ad0a157ad85ce753679179ca911264715aa9a6f8

Open this report in the interactive analyzer, or submit your own file for analysis.