Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1b02f432b2eae1f…

MALICIOUS

PDF

86.5 KB Created: 2021-09-01 12:45:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: b6a19bac058ee253dacab3fec9f9e84d SHA-1: ade414fb2c9157841250c107273772859fdf519b SHA-256: c1b02f432b2eae1faa90c21effbf983a5b0a4bdceab6fc1b6f46091e564e82ac
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains a link farm pointing to multiple compromised WordPress upload directories and disposable hosting sites, suggesting an attempt to distribute malicious content or phish users. The embedded URLs are designed to redirect users to potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 http://amandatravel.com/userfiles/file/1200056371.pdf In PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/c5d51a8ef24326bd9da6f426a5de3433/pafumuf.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/42ec1c37dfc5409f7cbaeade76d06f88/28485501239.pdfIn PDF document text
    • http://digitalqwerty.com/ckfinder/userfiles/files/zotesosojowaganexi.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/40754756515.pdfIn PDF document text
    • https://divanich96.ru/admin/ckfinder/userfiles/files/vikujezomufi.pdfIn PDF document text
    • https://mvmdigital.gr/files/files/berigikakiromufonib.pdfIn PDF document text
    • http://lnaixi.com/userfiles/file/20210831061849_1330216490.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/e0152b450b7797ce1aac923a8620e733/dewonobapatu.pdfIn PDF document text
    • http://myslizdrave.com/soubory/seduk.pdfIn PDF document text
    • http://sns-russia.ru/userfiles/file/23988441795.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/0c0d32f0c5ec1005357616a89f917e17/26246318434.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a928a101523---letuxopekotajazese.pdfIn PDF document text
    • https://simbhaolipower.com/images/file/fabanalazusetuzakezufami.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160853df5ac3fc---7953372257.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f6b7fa9d1f---69817387356.pdfIn PDF document text
    • https://peintures-descours.fr/fichier/files/76856318634.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/16118f7847883f---8264433348.pdfIn PDF document text
    • http://madang.eu/f_pds/fck/file/18289463716.pdfIn PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20210512010135.pdfIn PDF document text
    • http://thetestmag.com/userfiles/files/vimukajebaxurulepagowa.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607b14884e265---74866891422.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc2bacbc5d---berosepago.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/63d2be7d6133e616e6026122db0949cf/sagutifofomazegowajubeni.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=mouse+trainer+gamePDF 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_off0000ed3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001054e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054E 18052 bytes
SHA-256: e42819e1082f8085589c1f9d0130a79a51369f8d7d8e1c3fdee0e081ea89f1ff
font_02_sfnt_off00013450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13450 10500 bytes
SHA-256: 9b512f9ec8d2c1ee1875f81c10786ca6e104d0e0ae2574d7aa6837c67a1ab977