Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e0cc2ef1648e6fa…

MALICIOUS

PDF

80.1 KB Created: 2021-09-03 10:32:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: fc1b5aa6832026c87514339272e9a003 SHA-1: 410c609053fb8263bf556d4786e0e18d00c2c610 SHA-256: 3e0cc2ef1648e6faa3e2f8527d70a81028d4fb47bdbaae489b4f32ce3e2b6423
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure victims into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://showpalmedical.com/userfiles/25424859565.pdf In PDF document text
    • http://stalmost.pl/userfiles/file/84717783920.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/ttlbp1t9t16sk0mava3e229071/79792170185.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/75a1daa887ad5e593710df2a3274b2d3/givitafave.pdfIn PDF document text
    • http://mobydick-band.de/fckdata/file/52262645784.pdfIn PDF document text
    • http://siblom.ru/files/upload/file/sapalabekigoduloseluzit.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/476d4b7ba4e85c2a4962ff1f93364729/91423380266.pdfIn PDF document text
    • http://ambulatorioveterinariocigliano.com/userfiles/files/43966372152.pdfIn PDF document text
    • http://xn--o79av69abka850ab6c.com/upload/file/202107221514225324.pdfIn PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/eipj45gc7gbn7v7pevhfrlhgi1/wejipapelul.pdfIn PDF document text
    • http://wellfoto.cz/pictures/files/78697166296.pdfIn PDF document text
    • http://silverleafspa.ca/clients/10619/File/kokegufabeboj.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d42f7930a6e---solezul.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a1dfba9ea10---26652635171.pdfIn PDF document text
    • https://www.pessin-location.fr/ckfinder/userfiles/files/bagadijibadosiweruvop.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160fb755b1b508---39389754774.pdfIn PDF document text
    • http://sushrutproctology.org/ckfinder/userfiles/files/kikozo.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160779d36b1a4a---36002116269.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/9d0a1f0bdbafa2c9e07213184ca69ad2/25318705093.pdfIn PDF document text
    • https://actorconseil.com/files/file/jedaxutomekonomivelini.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/0sarc297oh4cgalbs46pn3s4lv/95551323556.pdfIn PDF document text
    • http://chalappuram.com/userfiles/file/vezetajunut.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/2to4h9aobrh54vj43olabrrgn1/sumukotarepepibiwi.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/80nuh52j4a3k70iq914qk1a6db/30576234018.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160984ca257805---magedunininasekivaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=baumatic+dishwasher+manual+bdw45+1PDF 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_off0000d4a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A9 16912 bytes
SHA-256: ace320298cb4cd16df702e26d06a310def126ad44dbd47465b2cdf405f937fb4
font_01_sfnt_off000100c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C5 11156 bytes
SHA-256: 887c86e69c0071be10d5e493f285b456379432caccc0e536ec14cb2766dd3470
font_02_sfnt_off00011ade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ADE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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