Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd7cc4aa4c258de0…

MALICIOUS

PDF

67.6 KB Created: 2021-09-27 19:14:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 60631d60fb96b5f9f0ce25b176e3d31e SHA-1: f74f07cb76aa33cb402344bee51340986da6db6c SHA-256: bd7cc4aa4c258de03b9b7980e66ff52a25daf1622e7d1bb6aa83ddf3523979ac
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains embedded JavaScript and numerous external URIs, many hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious content or download further payloads. The document's structure, with a full-page image and clickable actions, is typical for social engineering attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://philabc.ru/uplcv?utm_term=ludo+bar+mod+apk PDF link annotation
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/85b88aa71be251173c2011aed9cd3a2a/7438332598.pdfIn PDF document text
    • http://standardamulet.com/files/files/20990721223.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/bbc142e0eb15d80d505d114321acb78a/dixuwiseveranuxebufive.pdfIn PDF document text
    • http://www.ciesol.es/ckfinder/userfiles/files/volupojiximigu.pdfIn PDF document text
    • http://sjatupornservices.com/file_media/file_image/file/95508622434.pdfIn PDF document text
    • http://gunjanjain.com/app/webroot/js/uploads/files/27473471758.pdfIn PDF document text
    • http://canvangdientu.com/images/file/68726865055.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134402c4ca01---maxuwifavebimujiga.pdfIn PDF document text
    • http://www.frank-diagn.hu/userfiles/files/2862087323.pdfIn PDF document text
    • http://www.smpnuenen.nl/images/files/sigakejigivok.pdfIn PDF document text
    • http://hoaiduc.edu.vn/ckfinder/userfiles/files/71910901295.pdfIn PDF document text
    • http://www.tramag.pl/upload/file/xosaruzonetok.pdfIn PDF document text
    • http://anticacarsulaeborzoi.eu/userfiles/files/39756948193.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/51806326923.pdfIn PDF document text
    • https://belretail.by/ckfinder/userfiles/files/74958831372.pdfIn PDF document text
    • http://jandebruijn.com/uploadimages/files/10519770813.pdfIn PDF document text
    • https://tenfci.org/userfiles/file/96254584136.pdfIn PDF document text
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/49593199021.pdfIn PDF document text
    • http://robvancampen.nl/userfiles/file/zuxen.pdfIn PDF document text
    • http://himalayakebab.com/shipinc/userfiles/files/lijanedokani.pdfIn PDF document text
    • https://tessuno.com/upload/files/6144ba9e31a10.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_off0000ae18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE18 14096 bytes
SHA-256: fdb60d0006b50cb4232f0a57906e91bb0ad5c3d22dce8443ac5613841b0a501e
font_01_sfnt_off0000d0df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e8f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F6 10204 bytes
SHA-256: e7213bcc84a53792aebc737dfe8ca3da096c2dd0fa28cfddc7bbfb5a5327a9dd

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