Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cecd2bc0f00adf5…

MALICIOUS

PDF

92.6 KB Created: 2021-06-29 08:08:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 72177ed02e0ccb02d37497d4bb0e50cf SHA-1: 60fc87dd746489cc59e35545ecbe037da4caf074 SHA-256: 9cecd2bc0f00adf517e395ad5de61747e98bdb31e0556bfdb1dc816201d09eab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS upload directories, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/nqetl7np69hfrtkvpfq3ni27ji/62725037659.pdf
    • http://bocghedanang.com/media/ftp/file/90833262651.pdf
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/xazazanafodunufegipo.pdf
    • https://manenshop.com/upload/files/sigukibavobogotuxu.pdf
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/e847e3e04a7179d11ca67061c12ab319/giguramar.pdf
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d7cd2a434b---novijadikegarinipim.pdf
    • http://www.alex-vasilkov.ru/images/wisdom/file/55170735834.pdf
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097b58554130---nowojukuvufokozil.pdf
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c28d411db71---93206508981.pdf
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6cc6ad0b6---gisedaju.pdf
    • http://asianaccounting.com/admin/fckeditor/userfiles/file/gudidubunekegoni.pdf
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/38756f7a262f6682e0943a4dc146b007/36878189499.pdf
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/aa8ca18f957dc9f1d2f480e79c8a5e97/81270615263.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/89805693898.pdf
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/k27urbsf6d900jih3ilqs7qkvs/62648498141.pdf
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160a3548f66eaa---wotezujuwapuzufopa.pdf
    • http://dahchen.tw/userfiles/file/32366626277.pdf
    • http://wsp.pl/userfiles/file/46905212865.pdf
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/2ba565fb0ecc59fe7258dbcecbafe8eb/goselexivewuxipurube.pdf
    • http://daoltrading.com/userData/board/file/pifizamesezukepopirukixiz.pdf
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/bhn9acbp6872brn26a8q9h817k/jidukojukotij.pdf
    • http://chi-kara.net/userfiles/file/44116775572.pdf
    • http://africanhairbraidingsalon.com/userfiles/file/digimiviwusupewudewulez.pdf
    • http://thehigh86.com/clients/13680/File/46082683758.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=library+and+information+science+textbooks+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103ca.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x103CA 16792 bytes
font_01_sfnt_off00011be1.bin
5da338d75b1734b6e253cdfa4ea008a30ea20c4eb733c47535b5a20e00e18195
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE1 11140 bytes
font_02_sfnt_off000135c1.bin
8520e9095c695b0346148a2324b33d5e38cad9ea0675a9dbc0a9ba5b9e2d5e0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x135C1 17280 bytes