Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4afe977d45c5922…

MALICIOUS

PDF

170.2 KB Created: 2021-07-14 04:03:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: db044bc4d04504356301ce42427d110e SHA-1: 1cc1f01f8a587bfa59634a49332889e7428a4480 SHA-256: c4afe977d45c592295d8191bb00f01e6ff07344d071931b6a458e63a070eedad
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9890

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 http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/a76322e88522a4dcd1682946b18b13c6/2192772020.pdf In PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c001883c776---6282535584.pdfIn PDF document text
    • https://digireg.org/upload/30516032054.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a597f09b273---nukaxopore.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/21a8eb8a7ad914c478b50f8394ccc990/35585875768.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/n9enr9flab7nk080af88ntsue2/kofufobakawin.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/nltcbj934k0bubv5mpdm43hs25/neduxibididusizobane.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/402c262090e1048658879682e4101bc1/xeratuga.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/prcivl3b5dj5qbcbgpu7f75e58/katozuxafesebidajazo.pdfIn PDF document text
    • http://coinproject.com/userfiles/image/file/68283883156.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/c652lfndu641l8feo38kjii2th/nokusujura.pdfIn PDF document text
    • https://asiahijau.com/contents//files/gukepitaxekevobusifum.pdfIn PDF document text
    • http://www.cbs-emballages.com/upload/file/vawozakelewasibajerol.pdfIn PDF document text
    • http://feach.ie/images/uploads/file/xexunimazamufedixeja.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a639f6a1b94---28951568044.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160928e5f45fab---furekasapotedetawawizew.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d1ed24495d6---rimesorola.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/b2bc3c03c24ab9635de50c6502c14058/lulubevaxibemolonavupu.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/e24db48fa7cdb7f3f903e68398cae314/riwupirizokupili.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/39c875f0b68076418f9301e43b167389/lewisezetulavatepon.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948b3126b69---72026473694.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/2285bc92f806363020ca8887d19971a7/10670460048.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/149da5c41f92ca061d8a5c21b6e8521c/37962581572.pdfIn PDF document text
    • https://yepsell.com/userfiles/files/gefadasagedo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=staad+pro+steel+design+examples+pdfPDF 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_off00023b39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23B39 17604 bytes
SHA-256: 22ba4fa372d4f3ff505d86dfed82666ac60f09bbe5752aa1c87a295917140f56
font_01_sfnt_off00026945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26945 11020 bytes
SHA-256: bd42b1736fcc66c7e1d4b1e299964a7376b8a85ec262e2791f9979477fd5baea
font_02_sfnt_off000282a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x282A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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