Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7d678bf873533ad…

MALICIOUS

PDF

102.3 KB Created: 2021-07-09 23:08:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 4cbf601b42fd5f88d0f3dab3207b44f6 SHA-1: 70c0f3228bb398d1752d1ebd5587e6b374e6a2c2 SHA-256: d7d678bf873533adcf82c5a01d7255d4626fbb32845271772ac2bf7f242b9467
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely serving as a distribution point for malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, with the heuristic 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' specifically identifying the use of compromised CMS upload storage for hosting PDF files. No scripts were extracted, but the structure suggests a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/659dc10bd991d407783d67216b7688ea/39871857371.pdf In PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/08a391934c892ff728e41f92df2aa7b0/58373579793.pdfIn PDF document text
    • https://tipresentoio.it/images/file/21794037730.pdfIn PDF document text
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/n3nhp95756aac4n3uliljg8jh0/kuzila.pdfIn PDF document text
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160deb7fd2ddfe---62207461841.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/c1f52175c3116d6bb13ced93305b667b/wozulut.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/lelapisefa.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c858106090a---pemaxevex.pdfIn PDF document text
    • http://menloathertonhigh1980.com/clients/6/6f/6f83464fe0b13873896cace574d4baa5/File/18040571255.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609304576699c---85308546740.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c9772959d13---68877881842.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160812c37332c9---66110623610.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/9648b1f2f2764f20e68eb3d535f570c9/92647855351.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a347f9378b---86411799618.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/0947c76b9324b83dc9fd78ca29fa6133/71347466887.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/1f3c0ns8s0pj7s5j0brtp1p55o/51558183459.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c0c55483ee---62091314566.pdfIn PDF document text
    • http://capital96.com/userfiles/file/5212272180.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/13360996853.pdfIn PDF document text
    • http://kingalbertltd.com/uploadedfiles/file/zulunovuzenukerepupuzifu.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/a1fcd416eae5afe6a988711e17e16afe/labodelidat.pdfIn PDF document text
    • http://liyangah.com/Upload/file/gajozavuzumarufo.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/032bbc9010225d5264d7137364f887ab/vosukebifexadawadedevijuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=what+does+it+mean+to+paraphrasePDF 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_off00012d5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D5A 17648 bytes
SHA-256: 31d8d34ebc782338244791e5262f7fa35350b61f75f8717bc77f619f7cb5d21b
font_01_sfnt_off00015bb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000173c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173C9 10604 bytes
SHA-256: 333fec5656ee31080ccb8a62fd8582ec6f2bb091303ed468660e039000cef81d

Open this report in the interactive analyzer, or submit your own file for analysis.