Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d9b00ddc12f8264…

MALICIOUS

PDF

77.8 KB Created: 2021-09-01 13:48:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ac07793d144f73bfe65e53207dd2baf7 SHA-1: be910daacee212a994a2b5a01d844e0b5b188c39 SHA-256: 0d9b00ddc12f8264fef8eb26288c26e2c9fa112b8069685940175e6a6ac4ea53
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to domains associated with compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. 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 0.9992

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://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/65ce4df1f5c333fb82605c5324cc1427/taxogelorisavo.pdf In PDF document text
    • http://malagi.pl/user-files/fck/file/fesuzokakowisowamekuf.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/3fbb52829931948eb28d7a531e347ae9/dunugonati.pdfIn PDF document text
    • https://www.champagne-cornevin.fr/ckfinder/userfiles/files/koxizukisuxinudibem.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/50861521287.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160817ae05e3a6---73363320287.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/8361055b01ccbba122906ce9ddcca954/pigejatiwojurojowusexobe.pdfIn PDF document text
    • https://catbasailing.com/upload/fck/file/46858926422.pdfIn PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/77997095349.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1608cbd2a34014---9970675988.pdfIn PDF document text
    • https://nic-n-nate.com/files/files/16978903953.pdfIn PDF document text
    • http://drsuthichai.com/userfiles/files/4165025079.pdfIn PDF document text
    • http://huthamcauquanggiap.com/upload/files/22339862948.pdfIn PDF document text
    • https://www.tyrtaios.gr/ckfinder/userfiles/files/seriwikuwalanikagunubete.pdfIn PDF document text
    • http://originalbau.hu/imagesfiles/tenupesexizujomibasuv.pdfIn PDF document text
    • http://seanbittinger.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tudurujesemirutoxaxaxowal.pdfIn PDF document text
    • http://neoneofytou.com/ckfinder/userfiles/files/sazaxujatagal.pdfIn PDF document text
    • https://mumegram.com/userfiles/file/26633616410.pdfIn PDF document text
    • http://clubselectionvoyages.net/images/file/66694523669.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e155e6aea6---taxuxedogutogibamuvux.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d530e3787e---dusoxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=flsm+and+vlsm+subnettingPDF 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_off0000c890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC890 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e0a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A2 18276 bytes
SHA-256: fc983ca882ac2b47925e8c8b7635af5087fae1e048f741efe2a8f9aef81e9c3b
font_02_sfnt_off00011087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11087 10656 bytes
SHA-256: 095f7cb2212bd2219abccd29e23f2cfa3dde2379c0fb0b3eaf94c71346cef318

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