Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0736486862e2cee…

MALICIOUS

PDF

102.1 KB Created: 2021-09-05 16:32:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 552f30e440de23b7340418bc5d4c38f8 SHA-1: d2e1f9307445326de47e7c87539ebb7b329745c5 SHA-256: d0736486862e2ceee1a96ce01f54953ca96a2da68af97b25339c46c515785e5f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9867

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://allytemp.ru/uplcv?utm_term=spdf+orbitals+diagram PDF link annotation
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/34f34fc8a8610747ceb31f02be7d6d46/gibitakasanatowemipajuve.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6e9f14c06---12684533240.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609a791429c18---safepapawevogesudezelejog.pdfIn PDF document text
    • http://kanstm.com/ckupload/files/63061637630.pdfIn PDF document text
    • http://mdknoodles.co/uploads/files/kejozukanagiwopizudonozu.pdfIn PDF document text
    • http://blankheich.de/images/uploads/file/29994338601.pdfIn PDF document text
    • https://svingenieria.cl/userfiles/file/siralegojukeledebojusi.pdfIn PDF document text
    • http://wisdomtours.net/upload/file/91723528674.pdfIn PDF document text
    • http://domki-kopalino.pl/pliki/95113456257.pdfIn PDF document text
    • http://www.offshoreyachts.net/web_upload/editor/files/nopegizababej.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9cb7dd3e1a---moxebilekutezubule.pdfIn PDF document text
    • http://hz-kontejnery.cz/ckfinder/userfiles/files/kuzagosix.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/vsp49cuor7lmdccsn31d1dk8oc/89434134693.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160744199bfc33---8878165589.pdfIn PDF document text
    • https://inverpalmas.site/aym_image/files/noroxag.pdfIn PDF document text
    • https://unosms.us/userfiles/file/mivilowuv.pdfIn PDF document text
    • http://sherwoodchambergolf.com/ckfinder/userfiles/files/9592822634.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/1be30091972342fa60184a045a957f03/25767047270.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070bffd92ff5---rokodolonuninedotogirono.pdfIn PDF document text
    • http://eaeocs.com/clients/c/c7/c75ed17bfa54634cfc1039f1b599a7e7/File/75875378111.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7644946350---21770316703.pdfIn PDF document text
    • http://sumterhigh89.com/clients/863574/File/repaxoraxilubunazurisa.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3bf380d87---62586416474.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608038cc86e2b---48673745456.pdfIn PDF document text
    • http://vipnjl.com/userfiles/files/fusukunolokeviraku.pdfIn PDF document text
    • http://elm3rad.com/file/27417298754.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bc3fa282f7d---69329208633.pdfIn PDF document text
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/54598894908.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_off00012913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12913 10820 bytes
SHA-256: 8e0fcbe39730a99fa2f1ede9f5db9ac8d4515d9e8e949d411c40c7269eed632d
font_01_sfnt_off0001418b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1418B 18664 bytes
SHA-256: 80f10ab333103c7789e2a7e3c6161a10f6c7648a6acbb9f4a02d17c293357a79
font_02_sfnt_off0001725b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1725B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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