Malicious PDF — malware analysis report

Static analysis result for SHA-256 1509790e4c0fe399…

MALICIOUS

PDF

87.7 KB Created: 2021-07-01 00:05:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: a11239c269b7c852e4b2a701a03049da SHA-1: fa457de6b278f71f39ea2f762d12cce6b5a888c2 SHA-256: 1509790e4c0fe39999871ab0d58c0f6ddb77d34c74682b863320af6b566dea1c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload sites and other disposable hosting domains. The embedded URLs, such as 'https://wastran.ru/uplcv?utm_term=reason+for+eye+twitching', are likely used to host phishing content or download further malware. No scripts were extracted, but the PDF structure itself is weaponized to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://wastran.ru/uplcv?utm_term=reason+for+eye+twitching PDF link annotation
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/5be7e41d6388283ac964ac639cf4c653/3581548134.pdfIn PDF document text
    • http://boissee.fr/userfiles/file/fefazaxasij.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/cf8f341a08e5e25b1beff1d1ebce8c8d/44736215932.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/1b1d47689571c0a5090392fceb51fefe/27482498567.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/e58f504472a858899e08b22f467b3221/32955876105.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/18695100590.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a50ae6d567c---kutirax.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/8c2342b1ba5a77b20d086c63575193d2/82916798075.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/k76ktbsdb46f56r7j34kaumggu/49538448643.pdfIn PDF document text
    • https://chung-pei.com/userfiles/file/73172236262.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa8dd21b8f---xabilekugoguzefapufiliwiv.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffad01c62a---71498589553.pdfIn PDF document text
    • https://arket.io/wp-content/plugins/super-forms/uploads/php/files/vqko6fg77u3ea2tts3u5b0lg7e/72571708312.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/4hovrvc21e0hvjgqgb53cl94p9/82665697342.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16084fc4bc1fc4---kerepajidemoxuwivexezej.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/625l5ptm914503pm2djmp2k6uh/jusigisas.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/btbvd622fvq3s1nb00i1u6bnhe/4326607485.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/repatuzolelawerafab.pdfIn PDF document text
    • http://abnicum.com/files/file/6974070647.pdfIn PDF document text
    • http://jagodkaprzedszkole.pl/userfiles/file/gewuxawowelapit.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2daaaa4523---27517801365.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/96504822636.pdfIn PDF document text
    • http://aci-immobilier-douai.fr/userfiles/files/39996081728.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/da5e0469b509b4341912434c709e2026/dikajidoluworitifabarap.pdfIn PDF document text
    • http://fobosgrunt.ru/files/ckfinder/files/renirutekafudufoxuwino.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16084641f9be61---16536736756.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c89ee7069---jerefasefijusenexowu.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_off0000f560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF560 16640 bytes
SHA-256: 12d52735b7692ce14431eaf8d808e8d0918647e402a22ffe885055208335bd06
font_01_sfnt_off00012065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12065 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001387c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1387C 10812 bytes
SHA-256: a5bef1d37dc35ac8e8c6ca70e7c352351d3dd2134ca2828d25c6151374f44603

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