Malicious PDF — malware analysis report

Static analysis result for SHA-256 b102c6169892320c…

MALICIOUS

PDF

90.9 KB Created: 2021-08-01 02:08:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ce79de2a39abfc2a123ce8b47b08b1e5 SHA-1: 24d4e7b37ecb82451a3f0a4c938af090be6ff316 SHA-256: b102c6169892320c4bbe03393a33ca3d1888ed3fc69f128ea0a48ceea5e566a2
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites, likely serving as a distribution point for further malicious content or phishing attempts. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest an attempt to obscure the true destination and potentially leverage SEO tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c305975ae---55599086212.pdf In PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f3c8c29f9---43444423100.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/06e7068c5c7b0cd2d277694cafdcac30/5251281650.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a8d21411e---ruzuzufabidiguganegaj.pdfIn PDF document text
    • http://shbaicun.com/userfiles/file/2021072615100173499.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/db0c8abf38b3636e037c118787e3521e/movusokizidetazugerofow.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/bf4ca95669fd0c755ea3f6c03f7fdadf/81116901748.pdfIn PDF document text
    • http://altronic.pl/!mag2011/userfiles/file/33197663974.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a17d02272c9---14366213478.pdfIn PDF document text
    • http://eng.sut.ac.th/tce/2016/administrator/ckfinder/userfiles/files/47963475746.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e33204d2099---duwoj.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab4c05a865---66317069731.pdfIn PDF document text
    • http://yesilderecine.com/admin/editor_resim/file/jeripemadepilosezuzigawi.pdfIn PDF document text
    • http://flyingcarpetclementines.com/userfiles/files/kesavanegadevemik.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/no5arh05uht5qspg7b8mu6ved5/kilebisi.pdfIn PDF document text
    • https://bestofbucerias.com/upload/file/14758399664.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/6f5c4lrn9ammd3somtdh2rqvq7/velividazodudural.pdfIn PDF document text
    • http://orhs76reunion.com/clients/30721/File/lodixoxa.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/fkjmmljf3u6muestvtdtni7l8r/zilamuguruxukovevefubid.pdfIn PDF document text
    • http://iqlacpro.vn/emotive/upload/files/76003535869.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/20210512/210512072129568678rv6d5gi0kmuw.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ou9d1gb9qup3ndtgv4h6k39232/sowux.pdfIn PDF document text
    • https://soft-print.pl/app/webroot/media/files/97111185629.pdfIn PDF document text
    • http://dotacjedlaoze.pl/userfiles/file/sofirofu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=how+do+you+make+homemade+frosting+with+powdered+sugarPDF 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_off0000f7e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E0 19652 bytes
SHA-256: 974f7540b4a0dc371801af7ecf52f0b13d4fc7c47c40efd424cd960802dd013c
font_01_sfnt_off00012a6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14281 11280 bytes
SHA-256: 6de21390930627ab1caa95af65f7843ebf53a3a4b7a48a18b79e04c8301a7daf

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