Malicious PDF — malware analysis report

Static analysis result for SHA-256 2be6327d7da90038…

MALICIOUS

PDF

91.6 KB Created: 2021-07-18 14:55:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6edfb6d28382d362e6d06c93ae2d11e8 SHA-1: f3f87978b26147f3103021d817099222043956dd SHA-256: 2be6327d7da90038efefea2feacebb9fc4031fd637f1fd9ef9b0f5758d6e94fc
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/e68803819ad99dab8a3bf4bcaaf22ddb/tuwobomejowidi.pdf
    • https://sca-kc.com/scauserfiles/files/61100368585.pdf
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606cca4724c28---vuvotog.pdf
    • https://247christianity.org/fckeditor/userfiles/file/radawuze1624276798.pdf
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/160840539c19a8---pevomilela.pdf
    • https://store-connector.com/_upload_bilder/_filemanager/file/fegadedefogogakife.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/6b25bf0ea3c6fc38ce30e369c43194c2/39493218720.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eff6ebab00---bipukezutodiwes.pdf
    • http://suamayin.biz/userfiles/file/53887961268.pdf
    • http://colegiosantarosa.com/uploads/imagem/file/vodibelibadotur.pdf
    • https://siam-royal-view.ru/data/files/nonosojipobawed.pdf
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/b384d1e3054e41dec832c49f8d09c78b/feviradifilapebe.pdf
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/af3c3e243a29bf469ebbd3fea90b5696/52400450461.pdf
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/567f9ee98f8c193753f0306b3e040bde/padazut.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bde01327e17---pugerapox.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/jp7uefv1ut8032m2g69dv0g2l1/zimebagopojujatimixeg.pdf
    • http://thomasbelldescendants.com/clients/40432/File/35622545152.pdf
    • http://broadviewlibrary.org/uploaded_bvlib/file/7433034564.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc8ae328ced---3303437820.pdf
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/03fae6pcqr0g0j34gb4qmpcj2f/sabap.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e70c10e6b20---fotuve.pdf
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/6f0b5881321513cf5c9e2f4feae69e44/4626042547.pdf
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/6805bf69ee34aeccd16494373e10c47a/46235887927.pdf
    • http://dkyangmei.com/uploadfile/file/2021070202383873499.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160784fdac1b9f---62881829886.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=losing+virginity+to+one+night+stand
    • 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_off0000fe21.bin
9560b839b8c8b36c6d60e5cab1c97eee32447fe39d69f689800e0610fc190050
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE21 10620 bytes
font_01_sfnt_off0001162a.bin
87e13ae611cedc4f09cad1a72b130385e567fdca84693c31db2cfb8998c13846
pdf-font-stream PDF embedded font (sfnt) at offset 0x1162A 19500 bytes
font_02_sfnt_off00014767.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14767 16792 bytes