Malicious PDF — malware analysis report

Static analysis result for SHA-256 63263897786b0213…

MALICIOUS

PDF

72.1 KB Created: 2021-08-05 07:38:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 433d1aae0ef2a33143242005c7abebd3 SHA-1: b2a5816b05fbdecb253ad272f00a95b610ac927d SHA-256: 63263897786b02134c388161cec80e566aa3fba00cc04ff8038fa9ec6af49ee4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of links pointing to websites hosted on compromised CMS upload storage, indicating a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL targets are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/f6cjgkgop6g43sp3dufod0jf1m/67703272412.pdf In PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160fc154feba2e---94560928009.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160710d8d4d898---96384820063.pdfIn PDF document text
    • http://mexvp.com/ckfinder/userfiles/files/mituzivodurasotibomawo.pdfIn PDF document text
    • http://canevinclassof70.com/clients/6/6b/6b8b8ee0d314e59372afbcb75100d768/File/tatiz.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/d69eec10043fbfac6ba1e2a28a54ff73/93891993791.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/17962303640.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad9e0322b4---fovadoriwavi.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/37212941650.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/6b9275b2473a6e5672946ff7b2ea2b9a/dawof.pdfIn PDF document text
    • http://luingpyrex.cz/foto/Image/file/danarazurorogegebem.pdfIn PDF document text
    • http://tj-1970-50yr.com/clients/e/e8/e8fccb6fb94f20b6ca4375945b3939e1/File/mekavema.pdfIn PDF document text
    • http://remont-diskov.ua/file/fimonevogixajo.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/enoqs4hos3365v118ue3f39vc6/kewidaj.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/347f4e24d66ba5c5b8a7922535a99c43/fupulapuxotutoxir.pdfIn PDF document text
    • http://fotofolliasanlazzaro.it/userfiles/files/livuvufivoloki.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077561c510e7---zoxinoneguvamodowiroviduw.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/56863648630.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/8b3e00ee7ed83a5b067da129d16a0551/17543712882.pdfIn PDF document text
    • http://guanzhuli.com/userfiles/file/10766009427.pdfIn PDF document text
    • http://weddingceremoniesbybev.com/clients/72651/File/15397144847.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983fb14f23d---42786275638.pdfIn PDF document text
    • http://timebank.ru/sites/default/files/photos/pagefile/71328844186.pdfIn PDF document text
    • http://color-gateway.com/userfiles/file/4445660810.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=bhola+hai+bhandari+dj+mein+videoPDF 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_off0000b9ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9EF 10636 bytes
SHA-256: 3f46ffb1a1734e39b65537e3fcc36bbddec30d6219ec215a45c7303025e4b30f
font_01_sfnt_off0000d1f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F3 15568 bytes
SHA-256: 210f7cca62e6e1dd0f14cd3ee8035eeef3600f8829646423aca5b655beb38812
font_02_sfnt_off0000fa02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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