Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fe80e70e9efb7bc…

MALICIOUS

PDF

90.9 KB Created: 2021-07-22 12:24:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 93712abdc9244c628433dd321b5f546a SHA-1: 2f3c3b1a264c5e47dff870861872e6eebe0d4c7b SHA-256: 6fe80e70e9efb7bc484ae01b4db8cc3977992d5f1d131d5825f53581d061b6c2
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites hosted on compromised CMS uploads and disposable domains, indicative of a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or SEO manipulation. No scripts were extracted, and the document body was unreadable, but the heuristic firings clearly point to a malicious link distribution pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9876

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://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/203d00d43553d41b704af3955af6d26a/40213213910.pdf In PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/20e00bb717cf3adf241d830e75770e94/wozum.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/l40rqe8b9nj2vvg7t8r7drqr4q/tofulovurev.pdfIn PDF document text
    • http://studioriboldi.eu/userfiles/files/rorapatebezimujejel.pdfIn PDF document text
    • http://re-view.online/fckFiles/file/tidezumuseduvebapi.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/8q62es1jk010cijs1pnm7cn5p7/48279158298.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/dunijupowevewuze.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca87ed77ed---80379778546.pdfIn PDF document text
    • https://mmoxx.mn/userfiles/files/tebopizufanokela.pdfIn PDF document text
    • https://istihdamhaberleri.com/upload/ckfinder/files/guraw.pdfIn PDF document text
    • https://phuquiland.com/upload/files/ziwevuvabujurozuvelome.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160cdb6e074a5f---85124856798.pdfIn PDF document text
    • https://aneri12.eu/res/file/bivewobixuzixuwefepuj.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/pubomiboxemimesisabago.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8dd5b3a29a---87611198072.pdfIn PDF document text
    • http://bearings-home.com/userfiles/file/gosodoz.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/484p4vjb48pcsfdk8005mj2nbe/37058610204.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c1a4fc0259b---20864529328.pdfIn PDF document text
    • https://chokysitohang.com/Uploads/userfiles/files/sowom.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/28d7cb1e8d6f385efedcfe0a88e0cf67/33901439840.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb08fd7f98d---zipimepuvovitirudibuko.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/236a5b04fbc50b481b4f31da96045ae7/44913178750.pdfIn PDF document text
    • http://101balkon.ru/upload/files/vokimisi.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/cb4370ebac60e225db85922b097c937b/28001867884.pdfIn PDF document text
    • https://www.temtechnologies.fr/ckfinder/userfiles/files/medatabiso.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607a72a564b94---4696808207.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=business+studies+class+12+chapter+controlling+notesPDF 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_off0000fdee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDEE 16980 bytes
SHA-256: 332f7c8c7347d436530b867aff4b3f8ad694fa74c895e459bfa2644257327826
font_01_sfnt_off00012a15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001422c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1422C 11120 bytes
SHA-256: 284acf6adb710a0259ce1eec1c72f79359d7ff7e8460ee9cb84022a790dba69c

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