Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbf34f2725853d4b…

MALICIOUS

PDF

86.4 KB Created: 2021-07-16 18:16:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f55ab27d8116c40e51d4a422b9ac9c53 SHA-1: 659f20cf39dafeecbf0ba5ad90708d17d5188389 SHA-256: dbf34f2725853d4bc5935856fc90b36c4c526a8a3a08d4f19c10edbc55176017
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised websites, likely intended to lure users into downloading further malicious content or engaging in phishing activities. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a deliberate effort to obscure the true destination and leverage compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://nowyhotelik.pl/userfiles/file/rapivavuredis.pdf In PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/rimotogivaleba.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a73c3d4ab1d---fetenan.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/48761425588.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a8fa8d29f---xeterapelebipitesugifimu.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/gamagamurejokat.pdfIn PDF document text
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/79449981536.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/wotowuvejiwo.pdfIn PDF document text
    • https://epgeptech.hu/ckfinder/userfiles/files/fojamulazujosexigakowox.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/70565431472.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de319959112---70476281650.pdfIn PDF document text
    • https://galerie-louise.be/userfiles/files/xumataremawawi.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aed46076f75---tizigodixopom.pdfIn PDF document text
    • http://school15-tyumen.ru/f/sakipapofimogigilurex.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/9c844e475d43461aa03cd18c4653dcdd/paborolabadafisod.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070f58f94a87---gavobovesonaluxutavezek.pdfIn PDF document text
    • http://truhlarstvisollner.cz/data/file/57451582868.pdfIn PDF document text
    • http://fdscience.com/UPFILE/userfiles/files/zideraban.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/be6vbc4h28ur0e35vi6egqdktm/43803114446.pdfIn PDF document text
    • https://fundreamz.com/ckfinder/userfiles/files/68228703741.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/a65fe414c9078b18fa312b8a348871a4/68746591856.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/0a877ed8ced11beac37df05d1e46b2b9/86399767723.pdfIn PDF document text
    • https://footballsod.com/images/ck-uploads/files/tuparobaravugivamiji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=as+accurate+as+possiblePDF 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_off0000ee67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10679 17152 bytes
SHA-256: f70f859c6226b834780e656e5030fe9cb49ef80cb1c47bf4128dd7fd4ed57271
font_02_sfnt_off0001334b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1334B 10484 bytes
SHA-256: 6630a74f686dd360acbfe601e7cd5278a7282d7bed42734d7fdf6e0abc7fd597

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