Malicious PDF — malware analysis report

Static analysis result for SHA-256 6658b773538aad74…

MALICIOUS

PDF

62.4 KB Created: 2021-07-21 12:42:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4c3c141e57dc083c0e6a27e0242d964d SHA-1: b2155fb2342d8e1dbdfd76142c7a05aa7ec1bc60 SHA-256: 6658b773538aad74821e19cdf7d9e53754fee5394887ea4856b14b56567760fb
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV. It contains a link farm pointing to numerous external URLs, many hosted on potentially compromised WordPress sites or disposable domains. The primary function appears to be directing users to these external resources, which could host phishing content or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7292

Heuristics 5

  • 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
  • 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://playeasypiano.com/resources/fck_images/75059255336.pdf In PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/81264669873.pdfIn PDF document text
    • https://mkontakt.pl/dat//file/zozaxixinipazijuveruxar.pdfIn PDF document text
    • http://dd-eng.com/files/files/podiralapisebipofa.pdfIn PDF document text
    • http://clingac.es/d/files/61474144208.pdfIn PDF document text
    • http://cherishedmomentphotos.com/clients/8/84/84fe84b553acfcd191e166b7401b6f02/File/71788708439.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/11763512057.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16082b368dfb43---25868443740.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/589db8e5481e839f00aa51c03f6a1766/84915232345.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/a20cb179b5b628858f2bf405879003dd/jutuziralivixisu.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/a4781c1241b5b1889fa264bfb93b49cf/fizuroxiwiroxa.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/11075364428.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a79ef370d8a---20608432716.pdfIn PDF document text
    • http://thestarbusan.net/FileData/ckfinder/files/20210713_AD468FD44AEC1ACC.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd8f8aa9782---59907281640.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609249558bd40---lutuxofudikaj.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16080b95901be9---vivesukupawojalewexik.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/28263c48b266e501896d2b7deba7d620/raledokuxosebutosif.pdfIn PDF document text
    • https://panegovernance.com/ourprojects/chowki/UserFiles/file/jedajiwinof.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/bcmc2vqet31jgmjup12309ora2/29156475747.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/16079726540466---5259321788.pdfIn PDF document text
    • http://chromowane.com/userfiles/file/62613571177.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0cd98b722---53030071330.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/0ba35f6177ca99a5aaaf5fd68ba2ecc6/8765530882.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=embers+tap+housePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e1c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C0 10500 bytes
SHA-256: 8cd85744a459c219dcee9a9143930358a1e12a6502e7446ff69b509753601fd5