Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e6926c56483be58…

MALICIOUS

PDF

87.4 KB Created: 2021-07-04 15:45:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: ab7084f336bee1bc6af282fbe9a2a184 SHA-1: 3a28cb2b869a0e91b5523564d099215371560fe6 SHA-256: 1e6926c56483be5828da079bd460b76958384b819542179335c31e12a5bcce08
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it's part of a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to directing users to malicious content or further exploitation. No scripts were extracted, but the link farm nature of the PDF is a clear indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • 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.
  • 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://drafthe.ru/uplcv?utm_term=criminal+offenses+word+whizzle PDF link annotation
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/572e22d63d009346a1d7c404046fd87b/19146418200.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/a3ba796d3551ffaf810cdd69bb0e6eeb/bakuzofidetevanovijafivob.pdfIn PDF document text
    • http://feast.to/upd_file/zexowefuje.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/44406196279.pdfIn PDF document text
    • http://svx.su/ffile/file/soneg.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/7f9fd34a2281a755b24da72f8700b952/1068095982.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6981e1bd8---bafoj.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5aab7d0923---64729248337.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/magukijixu.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/kukizuli.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/ziwuvunakodefifukavina.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/6261bb08d3f3b8d98abf663de7b6002d/55169975164.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/71edrb1sqtoorobqgbenn2n59l/pawaxebataweluwasidilobar.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/bdd0b913327e465f86c01edccb3c1298/73809852819.pdfIn PDF document text
    • https://studiopros.com/userfiles/file/In PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/9c56ec32c982aab3a69ca8d58760515e/77665861251.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/kuderetukofokijetulixotok.pdfIn PDF document text
    • http://cdn.eagle.mn/uploads/userfiles/files/wulabexez.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/s90p5m1cjiktdiu6d0lkjhaa1a/puwanexizimi.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/66506428410.pdfIn PDF document text
    • https://bestofbucerias.com/upload/file/zibupipobududosopo.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/a0ac40be3f17ec9cd3488258507915cc/87251823409.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/a176fc39ab7d625422e0bcbd3e0193a6/12275709043.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077cd746cd70---41330229217.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/9c9a6570dd3dcfb09bab4867dee51aa4/9525994562.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a45ecaec076---gagomaxidikekusi.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF274 10696 bytes
SHA-256: 2664085ede549037a8a184536d5e6bb11db9cc4940608bec04a8cc17248a1a95
font_01_sfnt_off00010ad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD6 17240 bytes
SHA-256: b66165107b011d857c271515835388e6a833f4584718d1b78d2c0fc5222644f6
font_02_sfnt_off000137c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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