Malicious PDF — malware analysis report

Static analysis result for SHA-256 05bdd1d100b18ea2…

MALICIOUS

PDF

101.0 KB Created: 2021-08-23 11:34:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4ec13ff102dd94867bf4e6d1a8f883f3 SHA-1: 95a90c9ef4fb2365bacccd265ba6898490ba7e8b SHA-256: 05bdd1d100b18ea2641df2b7bfdd9fb41c9259737cc454b8e642cd524ee92834
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. Static analysis reveals it functions as a link farm, with numerous URLs pointing to compromised WordPress upload directories. These links likely serve as redirects to malicious sites, a common tactic for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 6

  • 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.
  • 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 http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608db3709486f---mubifaxupedagenegapo.pdf In PDF document text
    • http://familiehollander.nl/images/uploadedimages/file/forenotekidawanozu.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a31bcfdb9ab---86305467015.pdfIn PDF document text
    • http://2017.letnifestiwal.pl/ckfinder/userfiles/files/dasukukomawurod.pdfIn PDF document text
    • https://forexinc.ca/upload/editor/file/degorabotegi.pdfIn PDF document text
    • http://decom.pro/admin/ckfinder/userfiles/files/17840141405.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc293300fe---57597483748.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/11086125439.pdfIn PDF document text
    • http://df-2.de/images/daten/file/lisoxonuwefejariregejewu.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/ftfn5j26g1ck1218ik60m2p5hs/74333501089.pdfIn PDF document text
    • http://balone.net/_upload/file///wegopowogajokenebuvari.pdfIn PDF document text
    • https://toyotaautobody.com/ckfinder/userfiles/files/33460902716.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/298e8077063202fc917825bed04a068c/2126598165.pdfIn PDF document text
    • http://www.moyekolodin.com/files/67755742130.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/126a6aedcfeea8a0c0dd221c974aba7d/vupaduvunolujamopuxu.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074713f20ab6---77351030153.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/15175889725.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/831a3d21b831bbac20fbdbb1e7346d11/60223646759.pdfIn PDF document text
    • http://redfordunion70.com/clients/869360/File/tizum.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/56088184cfd4afa22847786c4f34f70d/ligepoxasip.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/728a853bd050dceaa4ceb5295386568a/tuzonenalerido.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/52f47ce5100581eaac9b4348e11d8a17/soferusidiga.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/17494704647.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=pedagogy+of+the+oppressed+banking+conceptPDF 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://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_off000127d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127D6 16936 bytes
SHA-256: 1d0018a34c314081dca10711e7578ba451a11a92fe8f412a7dbfcd7490d88010
font_01_sfnt_off0001542b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1542B 11200 bytes
SHA-256: 3842d4ccebb657e9b2d8cacf77cee9d4ccf2f80eda30fbfa5153608c6370adbe
font_02_sfnt_off00016dfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DFC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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