Malicious PDF — malware analysis report

Static analysis result for SHA-256 46cd57987efa6ed9…

MALICIOUS

PDF

85.2 KB Created: 2021-06-26 14:05:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c4ca0b576968333bf627fdfe86632bb1 SHA-1: 4871757c891738816a2824728a010ca012303265 SHA-256: 46cd57987efa6ed9cbcccd17faecbf64f9560353454af80f412d06b7e5cec98e
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded URIs that function as a link farm, redirecting to various compromised WordPress upload directories and disposable hosting sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are consistent with a PDF-based downloader or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://philabc.ru/uplcv?utm_term=275+inch+pounds+to+foot+pounds
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d286b99e25---97988135149.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096baa652771---86530779492.pdf
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160949daee44a0---rikoxukipum.pdf
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/43cbb313813e725d9c5f1427691653df/52886368757.pdf
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607eee5b8771f---30353246740.pdf
    • http://xn--l3chcucnqd9c0eua7b1k.com/user_img/files/risurim.pdf
    • https://bevelec.com/bevelec/dossierMois/file/89480428650.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/3c78aca205dc82dc843976aa3ee304d4/66200951418.pdf
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076dfe5331b9---74834982714.pdf
    • http://aquatrustfina.com/userfiles/file/solobipejojemirujulo.pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf4ed57597---74292372663.pdf
    • http://togetherwewalkny.org/clients/2/24/2411cc079aa0f0d7fd57f81c6163ecfd/File/netevabesekobonu.pdf
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b99d0865d30---zamufujirajumeberi.pdf
    • http://hncastlecable.com/d/files/supenosiles.pdf
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/m1gsoaqnh1n1qa2q7t5gnghhf9/47994863048.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16087b609bc6ea---fadedikiwe.pdf
    • http://xn----7sbakn3aoflleitf3m6a.xn--p1ai/userfiles/file/suvujokemavetunup.pdf
    • http://okfilm.kr/userData/board/file/16709445192.pdf
    • http://bertoniamministrazione.it/bertoni/public/file/tapofikelomefal.pdf
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/9fae4ha08coc5tgrhg4fkft0s5/30662784147.pdf
    • http://pampa.be/uploads/userfiles/files/30038484448.pdf
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/b2679cec65ad4025d88be317bda67ab8/bovimikuwari.pdf
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/cmchalpidekmg4mlnd78oq5g5q/18827593229.pdf
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/b72fe0e495fb318ef4f95ce8f238b9b3/42264115549.pdf
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/8feb176b2fd0f8bf05df588528e6653d/38936686767.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec39.bin
7e102f9040d9261a8588bfb9541e38eb003b1c24649006e005e4590179183a7e
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC39 16572 bytes
font_01_sfnt_off0001172d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1172D 16792 bytes
font_02_sfnt_off00012f44.bin
bdb205e157222c8acfebd8c4feaf33ff59b2c62ba3c462e7c9364be0f4102a35
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F44 10584 bytes