Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f5d2d1f699ddbe1…

MALICIOUS

PDF

63.6 KB Created: 2021-06-21 05:14:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: dcab23f94397bad092b4832dded7c13a SHA-1: df356a07bfb801ce35ed49ffc6981836e474cd96 SHA-256: 2f5d2d1f699ddbe1500a4a224056564b7532ad7dff88d2090a7e3d2c04075e52
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of numerous unknown URLs further supports the phishing and malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608262f976c20---29640031471.pdf In PDF document text
    • http://karunb.com/UpLoads/files/91194587433.pdfIn PDF document text
    • http://suamayin.biz/userfiles/file/33125478928.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/6835ebeed93a1513b4528a4fcc7821be/79826375766.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/xilewugel.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/f6474965bbc7ed89b2468ad4e6fbf226/7003772735.pdfIn PDF document text
    • http://lukoilmarine.com/ckfinder/userfiles/files/48123403117.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a06fd4b2356---sizok.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5be56aebe2---redifinowakeweru.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/06463e03620e6b77c66df19ccd984870/bonejijigoliz.pdfIn PDF document text
    • https://teenvolunteerhouston.org/wp-content/plugins/super-forms/uploads/php/files/345258de1ace7d375dbdcd591c17913f/fuxalab.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1606d26d093e2f---91475042209.pdfIn PDF document text
    • https://consultingexpert.eu/fckeditor/userfiles/file/timegeverijuriseko.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607909ef968a4---94284791489.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160868eac00f8c---nidetejameme.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c95e717d59f---49887061917.pdfIn PDF document text
    • https://cafesca.mx/ckfinder/userfiles/files/gebugegusesozotak.pdfIn PDF document text
    • http://mertlakustika.cz/images/pages/file/36747388114.pdfIn PDF document text
    • https://gachbinhduong.com/upload/file/91801780992.pdfIn PDF document text
    • https://capitalsyndic.com/userfiles/file/togozeliwavisuxenese.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=star+jalsha+phagun+bouPDF link annotation
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA22 5400 bytes
SHA-256: 5a27767b5f03b166e93f0bdfb6f930199780a0c926e0290a964b540f00936b8d
font_01_sfnt_off0000cc78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC78 10416 bytes
SHA-256: bc952860e92d7e5458c740a46d44f0a6b3c36effe1b0e9979c3c251159999bd9