Malicious PDF — malware analysis report

Static analysis result for SHA-256 92495a70edd7c26f…

MALICIOUS

PDF

119.3 KB Created: 2021-07-16 04:18:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 65ee84dc791072c6aad5342219fb8944 SHA-1: 731755d1f88ecb4e4e77563eabdf95900f09c9ba SHA-256: 92495a70edd7c26f0847f1cac6cfaf63d3d5cf4c0e1c26c4cf5d89916c1239a2
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. Heuristics indicate it functions as a link farm, with many URLs pointing to potentially compromised WordPress sites or disposable hosting, and specifically identifies the content as an advance-fee scam lure. While no scripts were extracted, the PDF structure and URL patterns are consistent with phishing and scamming operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://buddhavehicle.com/userfiles/file/lokivariluzobu.pdf
    • http://yilip.net/userData/board/file/42953796521.pdf
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/784b77da63ab4839e962d9fc703f9fb6/sajojapewomajaxutafosovar.pdf
    • https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071835ddc443---68880650678.pdf
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/umtnjn5933njij1b7u2pmdbnr3/82952691978.pdf
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/h8hqadsd2uj02lrscplh24aart/99782206125.pdf
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/8mf5j05gr6d8q7d2gg55thlnuq/88690234158.pdf
    • http://skncn.com/u/files/54683129247.pdf
    • http://wang023spa.com/userfiles/202106file/2021062501225170554.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd9ef4c58f8---48168049231.pdf
    • http://www.egavilanes.com/ckfinder/userfiles/files/62837788667.pdf
    • http://fsoa.cn/userfiles/file/47790160386.pdf
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/7vq47db0ir210oc8hvklh8rf02/64507024362.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160916d56d7172---momuzu.pdf
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a167803964a---bizerubavorafiretakowes.pdf
    • https://allcreaturesinc.com/files/files/90046794603.pdf
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b871bcf39---xekifulogusubax.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7933b29c2---75775157837.pdf
    • http://debsluxe.com/clients/1/17/174397649ed9f07baa8f9d9f48c72a4d/File/pogogeginezex.pdf
    • https://euroroma-bg.org/files/file/najugimijivepalus.pdf
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/46184216e981117316b4f5c1a1cd5714/5887801501.pdf
    • http://hani-bee.com/userfiles/files/28225591118.pdf
    • http://sigep60s-ncbeta.com/clients/44785/File/20496986870.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=applied+pharmaceutical+practice+pdf
    • 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_off00016942.bin
5e91fb038554cf49de5947cf22746695d7531eefaca827bd681d9c30207286fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x16942 10576 bytes
font_01_sfnt_off00018164.bin
0143499339ca590703316932af543fd840ade6b8eae857d83dd82317f3b5ad54
pdf-font-stream PDF embedded font (sfnt) at offset 0x18164 21680 bytes
font_02_sfnt_off0001b7f9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B7F9 16792 bytes