Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e504d959d0da937…

MALICIOUS

PDF

116.6 KB Created: 2021-07-20 00:02:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 5fdd47bb8422c37959ac9234272f9689 SHA-1: 30e28b096e22e96dd7ee671e3639853819b93ad3 SHA-256: 6e504d959d0da9374e040ec8b24ff5fb4d4d0e68ae13c5ae2ee300a4627e2688
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. Heuristics indicate it functions as a link farm and a callback phishing lure, directing users to potentially compromised websites. While no scripts were directly extracted, the PDF structure and heuristic firings suggest an attempt to deceive users into initiating contact for fraudulent purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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
  • 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://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/8efr6puluq3svl1edqo1hnmnf0/masewekax.pdf In PDF document text
    • http://lnimeina.it/userfiles/files/xiligewot.pdfIn PDF document text
    • https://synersys.fr/contenu/file/25752996110.pdfIn PDF document text
    • http://thaiboxes.com/piceditor/file/45177051829.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad146a0ec8---bopixewokozokudanebaro.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a2cb649b8---91110809138.pdfIn PDF document text
    • http://hifitness.hu/userfiles/file/larililozaroxabovarudog.pdfIn PDF document text
    • http://keacg.com/upload/files/54348180626.pdfIn PDF document text
    • http://chaitraglaze.com/uploads/85851398320.pdfIn PDF document text
    • https://glycocalyx.nl/userfiles/image/file/doxuwupusuxa.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160887e52d063a---kenevibaboxetexumabipig.pdfIn PDF document text
    • https://haysalon.com/public_html/userfiles/file/fozapakuze.pdfIn PDF document text
    • http://rickgrisolia.com/userfiles/files/wakonadimupaborajer.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6d7ee076a---96945861649.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/di1rl3047q3sq15hq78526alde/zamozakowuzuniboxabe.pdfIn PDF document text
    • http://geriatriccarenewjersey.com/userfiles/files/pozozidegitovusekutef.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608117c58af61---daxidenafemaleremosale.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098052c7fd31---musoxaduvabowewodaku.pdfIn PDF document text
    • http://kaitosushisb.com/uploads/files/60141448604.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/2983aee320b5206acb45583cc92a50c6/wosatuwumixim.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/b32bc5b209f354a4f1e29afd79a4bcbc/17218768671.pdfIn PDF document text
    • http://thetownsendfamily.net/clients/a/ab/ab79602242cca8f930cd52af13df1d51/File/beladiz.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/881e4fda89335f88b44a9f780cadfb68/vosodijetufowe.pdfIn PDF document text
    • http://frankslawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/13270709660.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/zibikugozuzudapusitevap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=wearing+diamond+ring+on+middle+fingerPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001720f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1720F 1780 bytes
SHA-256: ee6d8c25003eb2de61ee1fda640ec7b8e4605923364b71ee832b966c85f0f81c
font_02_sfnt_off00017a73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A73 10424 bytes
SHA-256: f97505ef75c7cabffc85c221978c4377b8f54b141095068cc638292db84c4d74
font_03_sfnt_off000191c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x191C2 18564 bytes
SHA-256: 8a76229836cc16fcef539fc0872d12b81f7afe24871054231a6ebebfb1c48cfe