Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b0c503691a298c2…

MALICIOUS

PDF

78.2 KB Created: 2021-09-22 14:03:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d163449f350988732c034295f91e9147 SHA-1: 092e2d79a88e9335c4ebdec9b7604d13f1aecdee SHA-256: 9b0c503691a298c21db908106494638d5da2f276538608212f136dfc835c864a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external websites, some hosted on compromised WordPress installations. The presence of numerous URLs, including one with a 'utm_term' parameter suggesting tracking, reinforces the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://irlanc.ru/uplcv?utm_term=biology+class+12+textbook PDF link annotation
    • http://pillshop.ru/uimg/files/jorepegefivezi.pdfIn PDF document text
    • https://toppelletmachine.com/d/files/37380694988.pdfIn PDF document text
    • http://1hozain.ru/files/userfiles/files/9100124160.pdfIn PDF document text
    • http://intelekt.biz/uploads/pages/files/kezikula.pdfIn PDF document text
    • http://avision-italia.com/userfiles/files/kexifunofekikefebixu.pdfIn PDF document text
    • http://golfvillageonline.com/userfiles/file/773234480.pdfIn PDF document text
    • http://asbu.net/uploads/FCK_files/file/gopesegaximewarudike.pdfIn PDF document text
    • https://rh4-h1tapi-turbo.com/contents/files/61682739169.pdfIn PDF document text
    • http://teresachild.com/upload/files/30152172715.pdfIn PDF document text
    • https://careerroots.net/ckfinder/userfiles/files/rasot.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140ae5b90747---24043336802.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1612f3e4d9052a---27276819894.pdfIn PDF document text
    • http://emiem.pl/public/upload/ckfinder/userfiles/files/12701929669.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149dee843858---fudadowafud.pdfIn PDF document text
    • http://dgkno.cn/upload/84023941340.pdfIn PDF document text
    • https://maintogelonline.bet/contents/files/37141316190.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16140e989c55a9---xejuximewegajo.pdfIn PDF document text
    • http://donahoelawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fufuxez.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/27222093325.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/0ac24cf524de025a1e086f6e7ff784a8/3984902398.pdfIn PDF document text
    • https://smwebtechnology.com/arishayurveda.com/userfiles/file/90464803211.pdfIn PDF document text
    • https://alkirbilaw.com/userfiles/files/55650838617.pdfIn PDF document text
    • https://cryptoshift.be/anaeter_capital/siteadmin/userfiles/files/14025529112.pdfIn PDF document text
    • http://eurolocal.info/sites/default/files/images/file/dokepomudovije.pdfIn PDF document text
    • http://nova-auto.com/upload/20166422761.pdfIn PDF document text
    • https://mptradingcompany.com/userfiles/file/pojopisepoxejumotenof.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBD9 10876 bytes
SHA-256: a67087bde63ab8ad5c43c54ae693c590d4aea5fcf7676cbbf97412a74cb4bae0
font_01_sfnt_off0000e550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE550 17436 bytes
SHA-256: fd7146f34b16ed85a3d69e9eabacb48986d97bbb41b2b3f5d30218c04b9becce
font_02_sfnt_off000112b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.