Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e4569c83a6deca0…

MALICIOUS

PDF

83.4 KB Created: 2021-09-01 17:07:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 65f6ad206447fc4e51b36cb6b1646121 SHA-1: 49f8d3cd845d085c6428291c5c3766442a8c9643 SHA-256: 9e4569c83a6deca02d100db859387bce59a035fa6e6a0125b5434c96780beb7a
176 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains numerous external URIs, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The presence of a raw IP address in one URI further indicates a malicious intent to obscure the final destination. The document body is unreadable, but the heuristics strongly suggest the PDF's primary function is to act as a lure to external, potentially malicious, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://pistant.ru/uplcv?utm_term=capitol+2+theater PDF link annotation
    • http://newo.ru/files/files/43693261091.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/51950935750.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/53627e738930835a417203c2799625f9/foxidefunirenujijedorowe.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/b7ccd37a3f4d3b570eca032becb528f4/30456323851.pdfIn PDF document text
    • http://ciccioinpentola.com/userfiles/files/bubuluful.pdfIn PDF document text
    • http://szpk.hu/_user/file/80115729782.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/vjmvhfk4sp277dkvjkvvm3biqb/39113307384.pdfIn PDF document text
    • http://studiomarcheluzzo.it/userfiles/files/pakapulebexinopud.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/57846daa8e1c1b8910fa4b5221512bcc/jopesakexem.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16106d60a93452---34486836175.pdfPDF link annotation
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/362c903f5705d5eab1bd448763854288/zifirubukokabofi.pdfIn PDF document text
    • http://topstec.com/d/files/54203362759.pdfIn PDF document text
    • https://mobiligennari.com/userfiles/file/wanoxo.pdfIn PDF document text
    • http://guides2alpes.org/uploads/file/temexejoso.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1c4387e1b---zabebamume.pdfIn PDF document text
    • http://ippon.lv/uploads/File/jefutumagisolupaziti.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1608a839a7ed55---rubasijazukuluvo.pdfIn PDF document text
    • http://scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/gakugosax.pdfIn PDF document text
    • https://rotterdampools.com/contents//files/delesozoxe.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/161274931bb73a---repavudarajibi.pdfIn PDF document text
    • http://beamstraffic.ae/amb/userfiles/file/99889736039.pdfIn PDF document text
    • http://www.impactit.in/ckfinder/userfiles/files/rafupim.pdfIn PDF document text
    • http://yourhealthyanswer.com/ckfinder/userfiles/files/wakekonateveganabor.pdfIn PDF document text
    • http://doggystylzgrooming.com/admin/photos/file/dumowokizuriw.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_off0000e3e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E6 17052 bytes
SHA-256: b4801382d659e2b6994edbeae81a22f29c9fe9bf5090378064200e676438f081
font_01_sfnt_off00011019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11019 10228 bytes
SHA-256: d1798c29f5bf098d06c5b3bd648027e0f4e7a3882242170835215dcf992194c6
font_02_sfnt_off0001273f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1273F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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