Malicious PDF — malware analysis report

Static analysis result for SHA-256 3686d9aa1a1e4b12…

MALICIOUS

PDF

84.0 KB Created: 2021-09-01 00:19:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6e2cac0cc0f3ae0601e2f039fa10df5d SHA-1: 938275772b648067174bf889fb2ea5a906068b6d SHA-256: 3686d9aa1a1e4b123061bda662a7bf75dabc4dbe8fd654374d3ee74df8d0980d
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains a link farm pointing to multiple compromised WordPress sites, likely serving as a distribution point for further malicious activity. The presence of numerous external URIs and the 'link farm' heuristic strongly suggest a redirection or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a38e288158c---28613581112.pdf In PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608448704f625---bonubujanovilarudemi.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/9c60501f51099ada67365ffd473bc501/61998182217.pdfIn PDF document text
    • https://ctners.com/ckfinder/userfiles/files/91174815058.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/d17ddda6435639742d502d10e68c0f12/6348122636.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2ca119ff2---gezuraxilosipufaze.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160707f690fe2f---podenofeladodusolotobara.pdfIn PDF document text
    • https://www.emcp-pmce.ca/_includes/ckfinder/userfiles/files/31730655282.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/cc1bd372256e91f702fa50994b01ab8f/11827419726.pdfIn PDF document text
    • http://whs1963.com/clients/7/75/758a827d59fb1c2827eec60421ffdc22/File/joragetowuketesebu.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/xaditejipo.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a1eec893c8f---nesowugutalokutegulamedu.pdfIn PDF document text
    • http://avonsteel.com/UserFiles/file/fupofunizukujomajub.pdfIn PDF document text
    • https://xlspandoek.nl/userfiles/file/zagugulibimu.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093febd4a860---lesenefazotizodu.pdfIn PDF document text
    • http://hpworld.hu/data/pic/Image/file/beluvadumamen.pdfIn PDF document text
    • https://ultralloy.net/upload/files/24250192347.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/e37ba442b52f2b518095d87916196e66/18943557965.pdfIn PDF document text
    • https://gamma-electronics-eg.com/userfiles/files/nijixebena.pdfIn PDF document text
    • https://istanajp.com/contents//files/93407177337.pdfIn PDF document text
    • http://asupuro.com/upload/save_image/files/xojus.pdfIn PDF document text
    • http://messtores.ca/fck_user_files/file/20815908492.pdfIn PDF document text
    • https://palet-school.com/files/files/53279005136.pdfIn PDF document text
    • https://ooo-kenk.ru/userfiles/file/jebidelemalufomemijof.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609066c148575---duvezarevijora.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=g+braque+paintingsPDF 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_off0000e160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE160 18852 bytes
SHA-256: e38db9fc044b1a5a56b8b9c6d086e6d71532ac9acfbed9143e6f93b9d7fbf96e
font_01_sfnt_off00011249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11249 10684 bytes
SHA-256: ba0cdd1f4d91c038b148c0a0d62986cbc1be6d4845cf77ed5850f1497675467f
font_02_sfnt_off00012a5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A5F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.