Malicious PDF — malware analysis report

Static analysis result for SHA-256 86dbae86b3533d9c…

MALICIOUS

PDF

69.8 KB Created: 2021-09-05 02:20:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 45abc95c94fa9b4749ca8e23e35716c1 SHA-1: c25a78b6e8692fcaa222c53b3bac4d59917aea9e SHA-256: 86dbae86b3533d9c24b6e8424dd21ff3c95afb34f79ddb570c05366a0b4a8fdc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection T1204.002 Malicious File

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, acting as link farms. These farms likely serve as a redirection mechanism to deliver malicious content or phishing pages. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, and the ML classifier strongly agrees. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware delivery campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 https://lasvegasrebath.com/wp-content/plugins/super-forms/uploads/php/files/476faf80f65aa6bc2ba40a72ad674658/78468670566.pdf In PDF document text
    • http://highendschmiede.de/highendfiles/file/titeboxapomizasun.pdfIn PDF document text
    • http://aktasmatbaacilik.com/resimlerfiles/nabit.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac114d323c4---32399696025.pdfIn PDF document text
    • https://www.marjojaspers.nl/ckfinder/userfiles/files/18237682199.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/lemuz.pdfIn PDF document text
    • https://ctners.com/ckfinder/userfiles/files/37973243328.pdfIn PDF document text
    • https://ipekyolumedya.com/resim_galeri/file/jidomezulok.pdfIn PDF document text
    • https://dlt-nkp.com/fileupload//file/67548410617.pdfIn PDF document text
    • http://dalboncostruzioni.it/userfiles/files/65194800680.pdfIn PDF document text
    • http://magnumprint.ru/upload/files/kuzosipojulazigos.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/452910b7aed73ba250fb60695004dc74/lotafuwosim.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/domurunolisovadenavabi.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/0554bd76749cbd203ead6a57c8f00413/latuwokazumege.pdfIn PDF document text
    • http://car-zone.sk/data/data/file/64500253539.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b21de4e3d---bofufokipidilevejipor.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/0d355b6b2af422ff73acb4bcf7746ed6/jixetuwalexetob.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608358d915f3c---63423033163.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160a6710a98b38---vuroxexonawiboluwo.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/a811ru4gplj4etgq1hgi65mqc3/99345334491.pdfIn PDF document text
    • http://daindnc.com/fckeditor/userfiles/file/64715675888.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612089224c963---beniwine.pdfIn PDF document text
    • http://web68s.com/upload/files/fazokizagabowegafab.pdfIn PDF document text
    • https://samowar.ch/upload/file/34655244116.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=hipotiroidismo+de+hashimoto+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_off0000b3c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3C8 10604 bytes
SHA-256: 56bfa5499844be71669c70bc6f226039903a211aac88d73783d3aebc004e2a0a
font_01_sfnt_off0000cbf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF7 14952 bytes
SHA-256: 52fc6931d2db9d799ba879e7ed9441d375f7e6a928c7953a3081232b162dc99d
font_02_sfnt_off0000f1a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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