Malicious PDF — malware analysis report

Static analysis result for SHA-256 f62c6c50ade12ddb…

MALICIOUS

PDF

86.4 KB Created: 2021-09-07 04:02:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 89c2d571082de317da0d50f71045662f SHA-1: 9bef1523f996e8d532a046545a521ce2ebcc24c6 SHA-256: f62c6c50ade12ddbbcb1b412c36f500063c7fd5ff648f14097e34883c69ac146
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it's designed to redirect users to malicious content. The presence of these links and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://crysiq.ru/uplcv?utm_term=yakima+roof+rack+installation+manual PDF link annotation
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c77cfa1b192---88251202099.pdfIn PDF document text
    • http://klick-tipp.at/ckfinder/userfiles/publics/files/81010329656.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/0jl859fs2caq4ic2utuor8md6c/439177669.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/ziwovirefije.pdfIn PDF document text
    • http://studiorestagno.eu/userfiles/files/xajapun.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/44138382336.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b238ac3d4cc---jobakumuzudoradixo.pdfIn PDF document text
    • http://xpeedon.net/userfiles/file/20210807065821.pdfIn PDF document text
    • http://deficanderel.com/clients/6/67/674a09facce11b7629d390eef9534ff9/File/89081765709.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/b1c0e42ad6f8d6ca5d53fb9eddb15b5e/76171184450.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3443e67e17---7573625126.pdfIn PDF document text
    • http://www.saaegfpolis.org.br/ckfinder/userfiles/files/sogafibu.pdfIn PDF document text
    • https://study4student.com/cache/fck_files/file/24874710356.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612a794e125e4---pijeboviwuwimuliz.pdfIn PDF document text
    • http://jeyadhurgatemple.com/userfiles/file/gewuzifikarefelebo.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2e9fd41c08---47581611642.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/ab401b1d1264cf07065c7f0954f2bf1f/rajakonobakizafekov.pdfIn PDF document text
    • http://brookhavenclassof1967.com/clients/0/0c/0ca802fc87877f8c548ddf85495caeb2/File/76776583425.pdfIn PDF document text
    • http://thechitay.com/uploads/userfiles/file/1831109956.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/19059868498.pdfIn PDF document text
    • http://petra-dario.info/upload/datoteke/13777703175.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/49e20dfc94323e0e0991ae00ad23fd19/84065857693.pdfIn PDF document text
    • https://xn--b8qxb801j.tw/upload/files/zulininelewanago.pdfIn PDF document text
    • https://chupwo.com/editor_upload/file/nubipe.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_off0000ed5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5D 17972 bytes
SHA-256: ec11fddf8a4728542bcd43b2f4b7cdceb7faf6c1462276adff75fd6f114ca3e4
font_01_sfnt_off00011c17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C17 10540 bytes
SHA-256: 2cfdb4860ebcf37aeda779c5c70d5319b312cfa6c2a45f43f1736ef5aa474a51
font_02_sfnt_off0001341e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1341E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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