Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a0f21d422f3ba9e…

MALICIOUS

PDF

85.3 KB Created: 2021-09-12 16:23:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 0d36680eb3549258492f4f170116026b SHA-1: acb8f6bb72a10825e78c4ae230607fc6229076a5 SHA-256: 6a0f21d422f3ba9e8caf0fd960b1d21889fc3aef646c4511ac1a30df4c34777c
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://queure.ru/uplcv?utm_term=watch+harry+potter+and+the+goblet+of+fire+full+movie+online+free PDF link annotation
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/vbun4t1ssmlrtpqi5nt71k99al/fipaxugam.pdfIn PDF document text
    • http://e3edu.vn/public/ckfinder/core/connector/php/connector.phppublic/uploadsfiles/kevesaxofuxabarenupuwen.pdfIn PDF document text
    • https://inprovitcentroamerica.com/ckfinder/userfiles/files/xuferuw.pdfIn PDF document text
    • https://juniorclublivorno.com/sitonews/images_upload/files/17060667955.pdfIn PDF document text
    • https://proetcontra.hu/userfiles/file/35476178577.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/kumebe.pdfIn PDF document text
    • http://hferrynetworks.com/FileData/ckfinder/files/20210911_240DAEA2EF7F9D4E.pdfIn PDF document text
    • http://kraski-chernila.ru/resources/file/memolajufa.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/c6cea030c5e451e4095ff51b82078657/46253696123.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/86248513233.pdfIn PDF document text
    • http://neboskreb-irk.ru/uploads/userfiles/files/60614129096.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/batozopafuxatigemani.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/1506950890.pdfIn PDF document text
    • http://www.slenderclub.cz/ckfinder/userfiles/files/toged.pdfIn PDF document text
    • http://capthepcongtrinh.com/uploads/news/files/6771037680.pdfIn PDF document text
    • http://abwmarlboropike.com/uploads/files/tofatefedanojudetatubovu.pdfIn PDF document text
    • http://mastrodibaglio.it/userfiles/files/25578882311.pdfIn PDF document text
    • http://incomingmakedonia.com/files/files/mogosogafepejumupukuxazon.pdfIn PDF document text
    • https://derechosenred.org/aym_image/files/76009353476.pdfIn PDF document text
    • http://german-ex.com/images/blog/file/52551969306.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/vupegapadodilo.pdfIn PDF document text
    • https://vidaleve.ind.br/ckfinder/userfiles/files/nirusagirodiza.pdfIn PDF document text
    • https://reha.bg/content/upload/file/jiwizaso.pdfIn PDF document text
    • http://longbienco.com/js/ckfinder/userfiles/files/levijuvagedufut.pdfIn PDF document text
    • http://quranday.org/userfiles/file/noxoxakoxuvaru.pdfIn PDF document text
    • 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_off0000e570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE570 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD82 18312 bytes
SHA-256: b011e15c2c1b9b0a0f63320145caa092cca8cd8841ff1f36d10011b886d81d23
font_02_sfnt_off00012d68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D68 11312 bytes
SHA-256: 12367f777340eb1789b2674ef4c5a3ad1eaa8b30368c12ad59741ae9aed39ab9