Malicious PDF — malware analysis report

Static analysis result for SHA-256 c70eab2376732c1d…

MALICIOUS

PDF

90.8 KB Created: 2021-07-24 21:25:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0c2338d2d799af0fbd04ced4b98458c5 SHA-1: abf3696fab149c1c0cbfb24ab59eb1e87c6f8fcc SHA-256: c70eab2376732c1dfe05b891a9987aa48770d61eb28ea54906111a1acce85833
156 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to compromised WordPress upload directories and disposable hosting, suggesting an attempt to redirect users to malicious content. The PDF's structure and embedded links align with phishing or scamming tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://netiko.ge/img/Data/file/xujotewimidapumolata.pdf In PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160756aad37e5a---majipibimonasonibu.pdfIn PDF document text
    • http://tortsurprise.ru/upload/redactor/files/ginatijujim.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/0b7d06bfa6f3724be57e0493d1dce879/76289272982.pdfIn PDF document text
    • https://myarchitect.es/ckfinder/userfiles/files/35335479808.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/8c4347058855c23c2f1b3926985f3a3f/jujevanotidumukinov.pdfIn PDF document text
    • http://fbchitchcock.org/clients/8/8b/8bdff38a390027835eb24981312b950c/File/gatekadogov.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d4666a4d7---36397278331.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0350dae6b0---jimavog.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c0e2fa05faa---91099718080.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/43683400690.pdfIn PDF document text
    • http://richiefamilyreunion.com/clients/7/7d/7d03816b951c94fc7c065ced7c7ccdcd/File/64572807985.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/f9ec7df0e0231ee703626f263cc8be0f/30361213243.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607de514d0062---77655961173.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/9e0c27a842ccb4c5324f6eada817df43.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160aa79abb476a---49582298396.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/t27sp2l6aof8hsq6g2kfredh12/fetaboxusevubi.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb1df81b80e---55788962775.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/1924554c7485fb8c97e82f19046f1993/vufiramepufodabonuz.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/61060629320.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbae075a258---56922992641.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/31883332176.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a79f13066---13807089547.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606efb47e6922---86395596041.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a66363d05d5---42423416922.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+connect+harman+kardon+bluetooth+speaker+to+tvPDF 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_off0000fc32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC32 11160 bytes
SHA-256: ac6e8c58bef0d5028cb5dc7851ebd448858e70d4814c80d0a36921b8959b8643
font_01_sfnt_off000115e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115E2 17464 bytes
SHA-256: 184c695fe885acbcf22e0e4dfaeaaa1412c81e47a63d7d0fc399b69fb5a00913
font_02_sfnt_off000142f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1