Malicious PDF — malware analysis report

Static analysis result for SHA-256 afb01587d6befdc3…

MALICIOUS

PDF

86.2 KB Created: 2021-09-21 01:25:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: f2b778593670ae1df460a07fa5c26f3b SHA-1: 0d713ba84506c1e637c5f4365c5a3a32f437a1ed SHA-256: afb01587d6befdc3cb9a41ca27f793a2d80c5f3bc088684d5ec87ffe9f9823bd
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 a link farm and a phishing trojan. The ML classifier and ClamAV detection strongly indicate malicious intent. The document contains numerous links, many hosted on potentially compromised or disposable domains, designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://stellar.ru/ckfinder/userfiles/files/66986355173.pdf In PDF document text
    • https://susta.vn/userfiles/file/50971446200.pdfIn PDF document text
    • https://sibservis.com/ckfinder/userfiles/files/fesemevovafopiwusas.pdfIn PDF document text
    • http://sissonne.hu/editor_up/90308913925.pdfIn PDF document text
    • http://flightshop.jp/images/blog/file/12446771907.pdfIn PDF document text
    • http://fpempresa.cen.es/userfiles/files/70040996279.pdfIn PDF document text
    • https://zoomkish.com/basefile/zoomkishcom/files/vebofofu.pdfIn PDF document text
    • http://vanhacollection.com/images/files/11875672211.pdfIn PDF document text
    • http://elliptical-trainers.ru/ckfinder/userfiles/files/54212755534.pdfIn PDF document text
    • http://www.abcklima.hu/data/editorfile/50440839520.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/24fabb82a4a56f7668542712e40185d9/supesepom.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/kv8q76jqbgdgjr9e8fhfsnk4d4/zotovalomevuw.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/1deaf3ad3d87e4ba3de023f985aeb050/junosusuvenajaru.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16141bc710cdb7---68108299788.pdfIn PDF document text
    • http://bukharaalpharetta.com/sites/default/files/file/6671889222.pdfIn PDF document text
    • http://hocikto.info/userfiles/file/dikitaruwuzimilasitiw.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/jaxoxalaj.pdfIn PDF document text
    • http://www.slenderclub.cz/ckfinder/userfiles/files/55989502523.pdfIn PDF document text
    • http://xn--nellieskche-0hb.de/userfiles/file/litemikakomiguvomirun.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc66030519---jexamekutizivagojefiw.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138ea1fe4e8d---zowofujomaropoxobake.pdfIn PDF document text
    • http://bacvietexpress.com/upload/userfiles/files/71541836720.pdfIn PDF document text
    • http://lexxyin.net/files/fckeditor/file/lezapiwalixama.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=vsco+video+editor+mod+apk+downloadPDF 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_off0000e8b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B9 10888 bytes
SHA-256: 8a9ff3076f985b5c79c089ead13e7dd4e59ff6331e8d57d8cd68dd635d484787
font_01_sfnt_off000101f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A0B 18760 bytes
SHA-256: 8f905ae6b2d1113251cf31e02cdfbbdceac242bbde38255e9b130dc437c91c3f

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