Malicious PDF — malware analysis report

Static analysis result for SHA-256 d00472f60ea6802f…

MALICIOUS

PDF

83.1 KB Created: 2021-07-20 20:18:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d43c104c240bba4f13f1d20a02e501c5 SHA-1: 950553cba1051d3704e880ba642696682dbd027d SHA-256: d00472f60ea6802fe11eb1b24e3a5ce09254fbbc9e265f03bef435b65745cdd1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS upload directories or are part of link farms on disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards the use of embedded content to redirect users to malicious sites.

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 http://viral-list-machine.com/ckfinder/userfiles/publics/files/misokatubikuloruf.pdf In PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092ef1d5c34d---18436680373.pdfIn PDF document text
    • http://megaprestige.ru/uploads/files/sokubetupipuxoroki.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd29ee5803---36659131934.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/picm3i4ias9q4k353elri316i0/puzitem.pdfIn PDF document text
    • http://schokoladenfontaene.de/idata/zutazujeduviwabidipuro.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160836d69c32fe---94881323896.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/43981798609.pdfIn PDF document text
    • https://airbays.com/userfiles/file/lekolet.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/lewusokoroladaperedefibif.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/p4amotm9autdf057dps0om8c4j/zonore.pdfIn PDF document text
    • http://carsonandchain-ip.com/userfiles/file/worawelowivexarodonibe.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160bbb1e916f03---gozida.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/31584906339.pdfIn PDF document text
    • http://hoteldanang.vn/uploads/images/files/42566253753.pdfIn PDF document text
    • http://www.insight-assessment.com/ckfinder/userfiles/files/18857601295.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/bf67d3207e0725d08716895438ddb64e/bevolewolubela.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/78b25540c611a5639ad6ab7442cf8a6d/45814144519.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/b4ab0843012f2000ec26bf7de67e9619/37511370808.pdfIn PDF document text
    • http://tsrmmessina.it/userfiles/files/2430278802.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad51818dd66---80303579212.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/vitaposejizuwovibozi.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/nvbdirqfdv447o2emmq38krbti/14038777243.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/cdo7lv6min84kruboqi4sgit13/pejuguvorevefos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+sign+a+pdf+in+previewPDF 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_off0000e24c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24C 16996 bytes
SHA-256: 7b8d48150b87dceaab2c97669d84a78a1b496e3ceb5418ed74e4ea6d17619b27
font_01_sfnt_off00010e73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E73 10768 bytes
SHA-256: 4236ce2f9db03203a6e43331672114a2842103348202ef4078a6679f468cece1
font_02_sfnt_off00012734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12734 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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