Malicious PDF — malware analysis report

Static analysis result for SHA-256 19ff1c275802e0c9…

MALICIOUS

PDF

74.7 KB Created: 2021-09-11 08:54:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 39f23ddd682d1e48800591c783e9e1a7 SHA-1: bf4a22443818f6ca96bc34a2dcd65bd1ffa0f525 SHA-256: 19ff1c275802e0c9229995b730ae3280bfe11f800dc2bd154eac16da85294c66
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://jubileejec.com/userfiles/files/widobotuxukobexisemabiwo.pdf In PDF document text
    • https://www.institutvzdelavani.cz/files/60396278363.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/6a6d1d4e599720f83b953d1cc9c5c666/90361409950.pdfIn PDF document text
    • http://tupnate.com/ckfinder/userfiles/files/94183508429.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/7nnf6uq2nnm25h722qvr0rn4l2/labix.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/8a3a600ae95ca2bf6d07ca351c57c681/47318255203.pdfIn PDF document text
    • https://ppntassone.it/dati/upload/file/difubijojedujude.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133aa9ca0b2f---zuwofifugirasepisotup.pdfIn PDF document text
    • https://grdr.org/paidel/ckfinder/userfiles/files/juxobituwideniverusaxe.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/59cf5010f6e473e603f0119be1e3e872/23014020284.pdfIn PDF document text
    • https://damsindia.org/admin/uploads/file/zelugogefijinitegud.pdfIn PDF document text
    • http://sunmoon-glory.com/web/upload/files/kunumivakojudisejox.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161309919d1129---gegemexufefi.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/zixem.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/161328c22c9f41---45499991453.pdfIn PDF document text
    • http://kaiyudachem.com/filespath/files/20210906101539.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/5ouacfq7caue7327plotauskok/kaxegu.pdfIn PDF document text
    • https://wangwangcamp.com/uploads/files/202109031253589378.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131d5d213519---57980317179.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/bupuvopudov.pdfIn PDF document text
    • https://istanajpdua.com/contents/files/nuwepino.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=mike+tyson+vs+roy+jones+watch+freePDF 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_off0000bde2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDE2 18016 bytes
SHA-256: 2509853c37224b85b33391c89967832a3e49d3e9e9f449c204c2a5d8382deebb
font_01_sfnt_off0000ebec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10403 10868 bytes
SHA-256: 4bd8881dfc9a3d9ff0a8da09987aa3fb4ec883e06437339b26ef5c12160c1318

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