Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b0cc17054e7ac16…

MALICIOUS

PDF

97.9 KB Created: 2021-07-03 14:45:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7fe2c8b979eefe7bad5697421ba8d5f1 SHA-1: 89072a8e02691a8e09a3e4fc393b42b36f92a155 SHA-256: 0b0cc17054e7ac16dfb0ceeb93390f02a481e12619ee9679bfe61886ced20fd1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous links pointing to compromised websites, specifically leveraging WordPress upload vulnerabilities. These links likely serve as a lure to redirect the user to malicious content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/0491c6cacea787d7a1b2d3787d7f151b/81670262728.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc0fd3e2e3---waten.pdf
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/d474b88cfb750014eccabee40b0aa4d2/41988503998.pdf
    • https://uleiuri.ro/userfiles/file/95921625669.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae6207d7b25---kesapozetuxedebokiwaxor.pdf
    • http://classicalgardenornaments.com/uplds/file/49912339793.pdf
    • https://marblobaths.com/app/webroot/img/files/84325610484.pdf
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/s2v9786rh65dc2rjsgtbebln62/82531485973.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae7a6f715b0---3368400592.pdf
    • http://yaeram.com/userData/board/file/bawijetabefakutoze.pdf
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0334e7fa5---fonexabupokuxun.pdf
    • http://dental1970.com/clients/5/52/52cfbc2c58cc98a1938bca6351e90795/File/47545325275.pdf
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e7a3f75a81---rutatiwalojuvozaxo.pdf
    • http://tgtech-auto.com/userfiles/file/bajepiwofimesotawu.pdf
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/ffa009ea01a0251b2807f2ddca943dda/nukomipenipu.pdf
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/51600b82b22b7811233b2f4add14d24c/98517378169.pdf
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/16087ad3c841c2---92842273218.pdf
    • http://ajarnveerapong.com/UserFiles/file/mesenufupilelepiranokem.pdf
    • http://zamokugrofa.sk/admin/fckeditor/file/losidakegegane.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/ffd7df3fcbd8c391fe448c7c7e215cb8/78646033812.pdf
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/ad88c16269bd565deb31a7b1dfca215a/zusagukitunogojanekebagux.pdf
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb92b48fd6---lopebaliworewawula.pdf
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/kgdqd0ol2rv49u9ctpsif0jdfl/50492031729.pdf
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/979b760c751f0c3996b1b0d1c7a621c0/34833628377.pdf
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/eb80c6df482db2822bf5d46a581f0e38/80119627853.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160906ac9bf173---33252177679.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=stages+of+clay+preparation
    • 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_off00011b16.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B16 16792 bytes
font_01_sfnt_off0001332d.bin
8202913b16033d010ab57eabe484dacd185efad6eeb64077b7c6f28e0205fd0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1332D 10844 bytes
font_02_sfnt_off00014c51.bin
72b6f2138fbaabb7ec8e78bc6c5e2ad49e9b45aca310300e1397b189808f5634		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14C51 16972 bytes

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