Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd6ff06819231fcd…

MALICIOUS

PDF

89.1 KB Created: 2021-07-22 17:28:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f4e667ede4a807935ddf6d5ddae1f8c4 SHA-1: 15d0ad80b5343ba435de93da64c6209185bded97 SHA-256: bd6ff06819231fcdf44a60e724ec30ecfc2c2a942c7603b1c874f243c8425cd8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous links, many of which point to compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure or a downloader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 http://waukeganeast1980.com/clients/877304/File/limovoxufexudi.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abe60e52844---89184338582.pdf
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f606e56983---rovela.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4f74e1501---vujajefape.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfae6676ff---43307667558.pdf
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/6247fb2f4c11241e55bc9eba4a7d9cb0/junigurezuzab.pdf
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/ba2285bfad6f4c869bf2661ad885d1d5/47268519181.pdf
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607f597b8c332---labugozakekid.pdf
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607892e74c618---6089114408.pdf
    • http://abwferrellpkwy.com/uploads/files/81729523126.pdf
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/i8ij0mppeb0hlcu940it5a6ja2/nakaxilavenodogoful.pdf
    • http://hghs61.com/clients/9/98/9814c5f28b4e93efd1f74733a9fd6b0f/File/bulelisanopemobel.pdf
    • http://hzzxtl.com/UploadFile/file/20210614205206255.pdf
    • https://ludifrance.fr/userfiles/file/vikasomari.pdf
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/c2a398357fe22ae11780fa71193a7781/zawina.pdf
    • http://doingthing.com/downloads/blog/geust/files/54182246199.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7a29534fe---sejibetetadivi.pdf
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1879602ce4---44558436118.pdf
    • https://ideylia.fr/uploads/file/kujesitawu.pdf
    • http://hotararicedo.ro/files/files/pupagekufe.pdf
    • http://sosnovgeo.ru/userfiles/file/negijajume.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/o773i79v3if1a7jh34h0dq46o9/48131841929.pdf
    • https://thaihoanghung.com/upload/files/vifozelazorasuxizaf.pdf
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1607174bfb6261---76807808186.pdf
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/2727a18a3e64ebe2cf27633c6ba9097e/68901772238.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=call+me+by+your+name+pdf+book
    • 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_off0000f515.bin
c6b70777b905e273abb995a1f0d5a0a220fb0ac422ecc40b1afe416c5daf9541
pdf-font-stream PDF embedded font (sfnt) at offset 0xF515 17748 bytes
font_01_sfnt_off000123b9.bin
187fdf80ffa4b70475fd2a66d431543327be80493efe9b691fc782e8d7a3410c
pdf-font-stream PDF embedded font (sfnt) at offset 0x123B9 10776 bytes
font_02_sfnt_off00013c52.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C52 16792 bytes