Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7caf63f8f23ac46…

MALICIOUS

PDF

71.2 KB Created: 2021-09-20 20:54:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a2a2629ea133bd67ee4f5e2e01d2a3fc SHA-1: cabb28eb9c564109f06cc2be5e7e78b9de1a48bc SHA-256: e7caf63f8f23ac4694f21acebceb378191c8bad3947e47a495fa722f91975a1e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a link farm designed to redirect users to various download sites, some of which are hosted on compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of numerous external links suggests a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://riccaassociati.eu/userfiles/files/gopiwimifixawi.pdf
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613c36798f9fe---konebomewuvawibutuweroj.pdf
    • http://bivalyracing.hu/files/file/10907814818.pdf
    • https://karlschool.org/uploads/files/202109010501308907.pdf
    • http://omni-links-europe.com/images/blog/file/53483859190.pdf
    • http://35ju.21tg.cn/uploadfile/ckeditor/files/82033077289.pdf
    • https://jasmijnbloemengroen.nl/userfiles/file/93584904056.pdf
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/ee52b60eab7a6f3d338c613c3d1c01a1/75747490849.pdf
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613eae2503fb0---zurolepofoje.pdf
    • http://ourpreferred.com/userfiles/files/gixin.pdf
    • http://ocean-ex.com/images/blog/file/65274889663.pdf
    • http://aorganboys.handyfriendship.com/upload/files/62537943282.pdf
    • http://thriftstorewebsites.net/flash/thriftstorewebsites.net/file/pugutozavomujonak.pdf
    • http://handinks.com/ckfinder/images_store/files/masopu.pdf
    • http://sziazsauto.com/uploads/files/31022187846.pdf
    • http://orderkai.com/uploads/files/88923694115.pdf
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/062ce442933eb7656ea79af3bcb43aaa/21729687128.pdf
    • https://studybrilliant.online/app/webroot/img/userfiles/file/76520983750.pdf
    • https://adeptos.clevercloud.pt/images/items/files/xujipusovozuza.pdf
    • http://sichera.eu/userfiles/files/binajuxipavifigeraz.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=dual+space+mod+apk+download
    • 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_off0000b7f7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB7F7 16792 bytes
font_01_sfnt_off0000d00e.bin
f2853dce9bd0754297d01a6eab75a72976457f3d02cd33468385ed016e377d01		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD00E 10664 bytes
font_02_sfnt_off0000e88d.bin
f880361cd7d82fa6a66d01fe75ca79dde7ab8d3202cbedb1b4e2e3b57e233f84		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE88D 15524 bytes

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