Malicious PDF — malware analysis report

Static analysis result for SHA-256 e26e33bceeab6799…

MALICIOUS

PDF

82.5 KB Created: 2021-09-06 01:57:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 37472458381a318f4350b70d9315cfad SHA-1: da647722f039a33cc1ab01362bdc284b9a040da4 SHA-256: e26e33bceeab6799709df4b6098e4b2c63b48938c557a4232a66997be5a796aa
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a machine learning classifier and ClamAV. It contains a link farm pointing to multiple domains, many of which are hosted on compromised CMS upload storage. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to host a large number of links on disposable hosting, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8b291e55c7---desibopokatomurogij.pdf In PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e95982b6c13---82037128581.pdfIn PDF document text
    • https://partnyor.az/userfiles/file/kegigalovaxeboxox.pdfIn PDF document text
    • http://didula.com/img/file/96120719451.pdfIn PDF document text
    • https://raiporjai.com/piceditor/file/15488355949.pdfIn PDF document text
    • http://sinosteelcode.com/filespath/files/20210811225732.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089a3777eb65---29865866999.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/f21f425e7a2d9ab248038ec584c29e87/47301980933.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf81bc73a5---81150203581.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e3370e97ebfdfdc0cb7ca27e06f1c422/bulaluzixosuterakin.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c7bbfc1f501---vuninunab.pdfIn PDF document text
    • https://reniuved.it/file/xufetekabagob.pdfIn PDF document text
    • https://basisnomor.com/contents//files/26154023924.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/vobujijikaxalapuz.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc75513453---watitafurej.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/dapomuterujugel.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/26883684484.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608807476809f---tememijaku.pdfIn PDF document text
    • http://goldenpoolandsauna.com/user_img/files/xixuvefuwew.pdfIn PDF document text
    • http://the-bom.kr/upfile/files/rimiguretixowitipezoguj.pdfIn PDF document text
    • https://cowichanmusicfestival.com/userfiles/file/47769507145.pdfIn PDF document text
    • http://kythuatviet.vn/uploads/userfiles/file/8403479906.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/jidilexaz.pdfIn PDF document text
    • https://atl-50.com/files/file/tulaju.pdfIn PDF document text
    • http://belniig.by/public/file/98630123905.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=catholic+spiritual+warfare+prayers+pdfPDF 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_off0000da12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA12 10944 bytes
SHA-256: 4eb2e17b31d46ed87dc6ef263d96807e405a85f8841e6948d7a0c62bb14a927f
font_01_sfnt_off0000f3b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B3 18128 bytes
SHA-256: d48288d981964637de8830533187ba4f7bdbe06ee8b0fa8dbc7e2601cd0d8338
font_02_sfnt_off00012296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12296 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1