Malicious PDF — malware analysis report

Static analysis result for SHA-256 95601886e7ea680a…

MALICIOUS

PDF

92.8 KB Created: 2021-07-26 06:55:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: d88113e3587ec20ab0f00b0d55b7de3b SHA-1: e8fbb0cb1c0e3c974eb792012e0cc9258ca164bf SHA-256: 95601886e7ea680ac3dbfb6b5a1ce8658068821a75f4d89b0737e1ef2412d151
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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 https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/0835d21b8623aec575c1ec624ef44103/vinate.pdf In PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160765c9e386e2---91002387586.pdfIn PDF document text
    • http://celyroknaterase.sk/editor_uploads/system/files/xepowevizatukaxokofoletap.pdfIn PDF document text
    • http://zjqzzx.com/uploadfile/file/2021071520170773499.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/68f54bddbf74d90ddbbf7a22e1bbdc20/majofigivaduveroregoluna.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b870a6b9dd5---rimanozizaziruvuru.pdfIn PDF document text
    • https://gamepinleri.com/calisma2/files/uploads/purivewup.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/srlv72ngq1ofsqphkgj80u59su/tizanataximitodomasar.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160762e5fc2720---25547016092.pdfIn PDF document text
    • https://fong-cai.com/upload/files/kinuvavomogavad.pdfIn PDF document text
    • https://mcdpiti.com/userfiles/files/zozirovelixufoniwo.pdfIn PDF document text
    • http://mgocsm.in/userfiles/file/13218802546.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/dd2749e4275c939f368edb17d68c51c8/redikivedituj.pdfIn PDF document text
    • http://dmhu.eu/uploads/uplib/file/zufudego.pdfIn PDF document text
    • https://gelblighting.com/userfiles/files/60694225056.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b5ef64e1e0e---megezawir.pdfIn PDF document text
    • https://watertorens.nl/userfiles/file/woralebogemumamorinox.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/roks5oi942l01p6tgj1q5u3ip5/50133730865.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/88e41f729a79c2fb85daf2a474d6678c/wutudowa.pdfIn PDF document text
    • https://jaurrieta.net/USERFILES_JAURRIETA/files/dalovaz.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/s2nq55bij2vm08u1r5u9v46psv/zubidupajelakavenaduwop.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/2eaab4dcc94a480442c71474d96852fb/46657221888.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607190f3c1874---vujivaziwamilisovi.pdfIn PDF document text
    • https://call-life.com/ckfinder/userfiles/files/77601735040.pdfIn PDF document text
    • http://tatvideo.ru/ckfinder/userfiles/files/dowowiwo.pdfIn PDF document text
    • http://daedukgs.com/admin/fckeditor/data/file/20210710190651.pdfIn PDF document text
    • https://gastrotest.co/ckfinder/userfiles/files/rafaxudasab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=naruto+ultimate+ninja+storm+4+apk+no+verificationPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E6 11084 bytes
SHA-256: 500c2b55a5c2085e466b0e7677e1dd130df7f7fe3eefd1582a26710059e0b025
font_01_sfnt_off000110cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000128dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128DD 17744 bytes
SHA-256: aae2735b3b149e6f789f4217ca446570ec173f031223081aa2c878c4189b8d4e
font_03_sfnt_off0001570a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1570A 2980 bytes
SHA-256: d621d606f304332aa2a533b4db0bd90a18bcb939744ec1f902a4e4d53d443a0a

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