Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc78d4207c7ed655…

MALICIOUS

PDF

84.2 KB Created: 2021-08-29 02:48:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: dd1c7b4c3b7aedc4e3c125f8397c2d4b SHA-1: 901796c127a0137127aff04670b88e8709248ce5 SHA-256: cc78d4207c7ed6554291718697db941888d591b698b2e559d0dc88595a802b88
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The sample contains numerous links pointing to compromised WordPress sites and other domains, suggesting an intent to redirect users to malicious content. The presence of external URIs and link farms indicates a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://pixomot.ru/uplcv?utm_term=be+or+not+to+be PDF link annotation
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/1dad8d120qbunhe4om2h1p9bh2/buxedigudugula.pdfIn PDF document text
    • http://tractortools.cz/ckfinder/userfiles/files/zumarixakemon.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16087156faa18d---38350989251.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/c7g9m1o8cilhj1u6kc94e2vvv4/56207921971.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1611ebba6275a0---basizizumit.pdfIn PDF document text
    • http://sewakendragroup.com/userfiles/file/vuxazalibovezuv.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/71078139964.pdfIn PDF document text
    • http://brenna-ski.pl/userfiles/file/63268206351.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612aa5f0a9f19---59619832004.pdfIn PDF document text
    • https://jss-moms.si/upload/File/sejeropapobefi.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/vozomumafijed.pdfIn PDF document text
    • http://abnicum.com/files/file/64920388118.pdfIn PDF document text
    • http://from.ua/upload/articles/2021/06/19/files/texulotawakuxefuvi.pdfIn PDF document text
    • http://turar-mussin.com/userfiles/File/jotosoniseziwekese.pdfIn PDF document text
    • https://idealist.ro/userfiles/file/6692005622.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c621b158036---mamim.pdfIn PDF document text
    • http://www.onlinetemsilci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608205481cce1---sobotagob.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa7efe8c09---kewufiwebewevonenoxaw.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8cfd6b64d4---34810316488.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/lexidom.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608919ccad9d6---79562261719.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/9771938831.pdfIn PDF document text
    • http://hasyo.net/files/file/70378680999.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d42ae200dd---vefabowebi.pdfIn PDF document text
    • 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_off0000eaf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF9 16988 bytes
SHA-256: 8550a039b5bcbff2f42d0ad605166cfed2f64ef87eee679773c486b3970d9fa6
font_01_sfnt_off00011733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11733 9824 bytes
SHA-256: 8751ccd08c3d4e4faaccfd4f8c7c926837776aee459e6cf4d6e6763b2797e176
font_02_sfnt_off00012ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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