Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9e6ba9cf32b2639…

MALICIOUS

PDF

85.7 KB Created: 2021-09-03 23:33:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 93e8f85bd9f2dd576df3e6c838be6909 SHA-1: ab6b1ec81e96f0c5d0a0a4d6fba894ff216a9105 SHA-256: e9e6ba9cf32b2639be8691009aa49c027a15e3c92854eaf779b6b5f0cae8bfed
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised or disposable hosting domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links. The file's structure and URL patterns align with techniques used to obscure malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9810a05712---40354694074.pdf In PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607865ebde081---pagasuzubepuxolisimimade.pdfIn PDF document text
    • http://vce34.ru/attachments/file/jofibikovi.pdfIn PDF document text
    • https://projetounificado.com/uploads/files/tovuluxutez.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a16157cd9---vajasidiva.pdfIn PDF document text
    • http://cuhs1981.com/clients/8/82/82ca37c076ec4232796cb58ed009bb3a/File/10442164060.pdfIn PDF document text
    • http://mientaytourist.com/uploads/files/32954223733.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/2b04240604317f696ecf2b9497ae086b/mulasoweximitivifazo.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609629175ed0b---51293025904.pdfIn PDF document text
    • https://holcom-wd.com/webroot/img/files/79459230860.pdfIn PDF document text
    • http://xn--80aagkbrca3apkgkee0a1bi.xn--p1ai/ckfinder/userfiles/files/kepesixupi.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/511353f7308db01f33716b459aa19a20/samekodazitev.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/c9633a59f5b5b22356cdf1bb08c9ad93/rezaxiwovifi.pdfIn PDF document text
    • https://tvmreza.tv/ckfinder/userfiles/files/mamewuxepamoxoja.pdfIn PDF document text
    • http://hiroi-es.info/yamituki-n/uploads/files/44528636565.pdfIn PDF document text
    • https://ancoraeducacion.com/images/batolo.pdfIn PDF document text
    • http://weforyou.it/userfiles/files/fuluregak.pdfIn PDF document text
    • http://upoart.com/ckfinder/userfiles/files/weximomeru.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16115d1f6b02f8---45701435329.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a4092faeb22---5105434381.pdfIn PDF document text
    • https://micsys.in/userfiles/file/11831552254.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/49355318639.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16123df060f31c---55765637867.pdfIn PDF document text
    • http://baohanhranghm.com/upload/img/files/tabiderelirurapojanewin.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/0453e163bfe462e68cf70898b759cc94/90294946122.pdfIn PDF document text
    • http://palestraarkadia.it/userfiles/files/xidivomaxuki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=selected+poetry+of+william+wordsworth+pdfPDF 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_off0000e7f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001000b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1000B 18228 bytes
SHA-256: 9a81d2b55d80ee07bbeb9d76e5da000097a7dd9e9ed76c184c2d56c7379b99d9
font_02_sfnt_off00012f50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F50 11056 bytes
SHA-256: bdc9015f5a4c36d43b5cb597af165024b051f14b3d3c05c8593142c149bcbdcd

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