Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cc1c31d79742709…

MALICIOUS

PDF

95.8 KB Created: 2021-09-08 03:12:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: bc0235be05f62977ed72f705ee6ec0d1 SHA-1: 5acc93921b8d351dec237496551a2dd5d425b267 SHA-256: 7cc1c31d79742709b8fc2501bc3634edd37acb0f126edf97c186d839aad88482
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. Static analysis reveals it functions as a link farm, with numerous embedded URLs pointing to compromised websites. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

Heuristics 6

  • 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.
  • 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://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/131342ccbe4fcdea66b573600c2bc85a/mobugofatej.pdf In PDF document text
    • https://romalasergroup.com/userfiles/files/42989577161.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccb7332d2d---nodulez.pdfIn PDF document text
    • https://jdrum-music.com/uploads/ckfiles/files/95880415021.pdfIn PDF document text
    • http://dezmaster.com/userfiles/file/92655238350.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a407d7e25e6---midapetimolalufewefu.pdfIn PDF document text
    • http://dieta-plus.pl/userfiles/file/judemalodefufegavik.pdfIn PDF document text
    • http://anpo.vn/upload/files/komukorurafe.pdfIn PDF document text
    • http://notarbrazda.cz/userfiles/file/pazenamogow.pdfIn PDF document text
    • https://webmenuplus.com/images/file/42442069195.pdfIn PDF document text
    • http://bradhelferlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dogozunogezatovez.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/63276397011.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d734f02ea50---949268408.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/faxot.pdfIn PDF document text
    • http://mdc.ir/ckfinder/userfiles/files/mopalevuxoganuxokofagi.pdfIn PDF document text
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb89e56392---tuxuduwufogogijavigaxav.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db8461e2abc---dukeziladumaga.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/45050956619.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160719bbc7a8ec---niwufasubuxewijonosazaw.pdfIn PDF document text
    • http://studiotravenzolo.it/userfiles/files/vewenunepojajexuxipufox.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/91554175f98a57a4b0aad3b8b2ab4f2b/33324300343.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/a7c5a0b45d8b246e71c7c4d9ae849af4/jaxaloz.pdfIn PDF document text
    • http://cuboni.com/uploadfile/hong202107261033537620.pdfIn PDF document text
    • https://rrrc.us/userfiles/file/pirajeku.pdfIn PDF document text
    • http://studiofapas.it/userfiles/files/dinozememujalepowamuwenud.pdfIn PDF document text
    • https://atrax.hr/files/fagolugutakedivanikebu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=conversational+hypnosis+code+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_off00010e95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E95 19108 bytes
SHA-256: cea087cc1d038fe4a7939f4abd0151d8eb1929226b1ebaa96ed55d5408260019
font_01_sfnt_off00013fbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FBC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000157d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157D3 10928 bytes
SHA-256: 21749e825349cef30e96713414cd65f799c339e426f131fb3b71d97984c2e476