Malicious PDF — malware analysis report

Static analysis result for SHA-256 e554afe8fbbccf51…

MALICIOUS

PDF

76.5 KB Created: 2021-09-26 06:27:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: a15759ee0d96b87b5f76b74ae763d66b SHA-1: c596e513b5709e757923b82f36593f7238f5206a SHA-256: e554afe8fbbccf514736652d9f0700b55d3d37610bcab731f2ef2c038fa4a1c9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, directing users to numerous external URLs, many of which are hosted on compromised CMS uploads or disposable domains. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16130df0112f26---metiv.pdf In PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613521a6e6989---80481946364.pdfIn PDF document text
    • http://119pump.net/d/files/99017942522.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614f9a542aaa7---7612312221.pdfIn PDF document text
    • http://kruengrangthai.com/files/files/28222171961.pdfIn PDF document text
    • http://dreamsurgeryen.net/ckupload/files/matalumetimugililivedesad.pdfIn PDF document text
    • https://perkunasstudio.com/uploads/files/202109031648364947.pdfIn PDF document text
    • http://samnakthodrahassob.com/userfiles/file/33557999140.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c9a021e14e---surazozeweberarexomu.pdfIn PDF document text
    • http://travelspace.pl/userfiles/file/dubekaxika.pdfIn PDF document text
    • https://rallstarawards.us/nbloom/fckuploads/file/fudukalu.pdfIn PDF document text
    • http://telegid.tv/userfiles/files/jisotuvotosif.pdfIn PDF document text
    • https://ice-group.pl/userfiles/file/32386038821.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/a05e54def6a80f84cf5cddf0acca62a6/355144174.pdfIn PDF document text
    • http://abarappresentanze.it/userfiles/files/94934355313.pdfIn PDF document text
    • http://dragoniresorts.com/userfiles/34418224143.pdfIn PDF document text
    • https://padservhosting.com/userfiles/file/19177665881.pdfIn PDF document text
    • http://nattuvaartha.com/assets/ckfinder/core/connector/php/uploads/files/vidomamifiwi.pdfIn PDF document text
    • http://darstin.com/userfiles/files/vanawadokelokowowe.pdfIn PDF document text
    • http://frankifoto.com/uploads/pages/files/laxasadezawa.pdfIn PDF document text
    • https://rajaketiga.com/contents/files/64846469894.pdfIn PDF document text
    • http://colokit.thienlonggroup.com/Images_upload/files/tuxijiruxubotejif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=cyanogenmod+oneplus+2PDF 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_off0000bef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEF2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD704 20284 bytes
SHA-256: 19c8ddb7592f1ff13e8a5d789532a2e57723423780997574ca69f2c53db0cc7e
font_02_sfnt_off00010be6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE6 10812 bytes
SHA-256: a17c8cf266534fe9700564d00db58688f0f760fdb10a6e25d187da58511d701d