Malicious PDF — malware analysis report

Static analysis result for SHA-256 6911c3e126d3a30c…

MALICIOUS

PDF

78.9 KB Created: 2021-08-09 22:47:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2d36deb92b4516f2c011c5ab07b97938 SHA-1: aea08b4fefb95186fc8c4662883c04abc06a43f3 SHA-256: 6911c3e126d3a30c1999ee19755d82726a192fd6302ac61b6a6d4ecdf68bbe66
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a phishing or malware distribution campaign. The presence of embedded URIs and the overall structure indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://nomylo.ru/uplcv?utm_term=tubemate+youtube+downloader+2.2+5 PDF link annotation
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/51274278610cb0d5903ac009d8bc520a/guvasoxudoganepuxutapinom.pdfIn PDF document text
    • http://okulsanmalatya.com/imgup/file/13505308522.pdfIn PDF document text
    • http://personnelstrategies.net/userfiles/file/12850881845.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/130cfb045763de1f5763c4577b5c3a3e/lobulosalegovu.pdfIn PDF document text
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/bapifuxuv.pdfIn PDF document text
    • http://modellszerviz.hu/userfiles/file/xodivisupipibobobazojonad.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078e507b4118---favoripuda.pdfPDF link annotation
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/04f695bc0e9d57dcbaad8560ef8bab92/xupem.pdfIn PDF document text
    • http://chatfieldfarms101.com/userimages/46503945675.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160701ce77e108---33218410559.pdfIn PDF document text
    • http://20thhelicoptersquadronreunion.com/clients/71358/File/giwevexolinuki.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609048faa1ea7---zekirufejoli.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/h6hfkevhcjudb61g3sci7amj24/58301665307.pdfIn PDF document text
    • http://yacpa.org/yacpafiles/file/jawoguxatatexive.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/be6606d5237e562849e13c6d83b0c08f/vonoko.pdfIn PDF document text
    • http://xn--e42bt3l.net/upfile/files/bodamulodatevaba.pdfIn PDF document text
    • http://akpanlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/64715255032.pdfIn PDF document text
    • https://amoslodge10.org/ckfinder/userfiles/files/93226963453.pdfIn PDF document text
    • https://roweryelectra.pl/app/webroot/uploads/file/16218692168347.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/60778747003.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/5d92a827c3759d1e69658debaaf15aa7/45610894382.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/pepapijajage.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_off0000d213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD213 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2A 10872 bytes
SHA-256: c2ce44ffc8256befb8cbfc057e0d4c8cd1a87289ed51f6ef0603bea3603fe5a6
font_02_sfnt_off00010378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10378 16116 bytes
SHA-256: 0f89d3cdeb9efb949d96610d5441b34e25e6df812afd3495c917519f0c42bcf7

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