Malicious PDF — malware analysis report

Static analysis result for SHA-256 30b60b248b935bcf…

MALICIOUS

PDF

92.7 KB Created: 2021-09-06 07:18:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c0b4679f6db44e6e39d3d199f0a7bd12 SHA-1: 2480612e450176ca4d775cb791ec13f2739f99fc SHA-256: 30b60b248b935bcf4c08b969b83d5bbfac4f854afad30a17afe4f8863c1d65e2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and links to compromised CMS uploads, suggesting it's part of a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://huntic.ru/uplcv?utm_term=torticollis+exercises+pdf PDF link annotation
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160e87e2c1b345---puvik.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/tifobaguzaxuvotu.pdfIn PDF document text
    • http://moto-bike.pl/userfiles/file/93593706000.pdfIn PDF document text
    • http://gopherandsquirrelcontrol.com/admin/images/file/40033643362.pdfIn PDF document text
    • https://vitanov.rs/files/razogotetudizisoboxi.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/e4f6a7f8908afcba69521b24d9c85578/gufavili.pdfIn PDF document text
    • http://www.trisad.kz/ckfinder/userfiles/files/mevatarogodafipimasoke.pdfIn PDF document text
    • http://rfychina.com/upfiles/files/16291373192680.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160d6d38a485ac---mujopevo.pdfIn PDF document text
    • https://vetamblj.si/ckfinder/userfiles/files/piduxazenibejosixekas.pdfIn PDF document text
    • http://yurisolomko.com/userfiles/file/77902199093.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/1985be8d439e55b0cb6ee47293b2593c/56320531079.pdfIn PDF document text
    • http://ventss.ru/userfiles/files/pomapawogugelagorixot.pdfIn PDF document text
    • http://bbdecontra.com/userfiles/files/gagogumovikome.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c35c739b3b7---pekupedigerinoliwuzal.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/h5r3dg29q79skl959jt8erplrv/65188233693.pdfIn PDF document text
    • http://geteffective.biz/uploadfiles/file/85405993012.pdfIn PDF document text
    • http://olech-rzeszow.pl/userfiles/file/kutukamugomaxisewavewiji.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160e330b9c36b9---basutagabituxezudipape.pdfIn PDF document text
    • http://praguynakorn.com/praguynakorn/picture/datapro/files/jijitiwufudunobotemabit.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607507321ef92---57694672356.pdfIn PDF document text
    • https://bbu.vn/Images_upload/files/41559015369.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d1b887d26f---miwutulasotamor.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073b1fdae274---19675198787.pdfIn PDF document text
    • http://pvhs1980reunion.com/clients/e/e5/e5e9f74eb83211af097e98bf68d59c4c/File/filimifirafusaguzojidum.pdfIn PDF document text
    • http://etnorom.hu/pictures/radevaxefuragositegiteven.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_off000104c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C6 18404 bytes
SHA-256: cb061d8c1809a9c4149e82a3a1185bc0d6504f076f83af42419c51559ecbc36f
font_01_sfnt_off000134db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014cf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CF2 10412 bytes
SHA-256: 5d0aac6b6462f572500fb9cb4eda5be72bd3c6cc8e4e1ce0d141c746ad92bac1

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