Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f8cae5fd9469086…

MALICIOUS

PDF

80.8 KB Created: 2021-09-02 06:46:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7c9eac23580b7c0a77421b5cde9f99b6 SHA-1: 28d931d0f2dcebd46df238d70a8b79eb0fb280f7 SHA-256: 8f8cae5fd9469086f9fd730fc0928fb30a26ec7a51ed558fc82ba71a062b31ca
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised websites, including WordPress upload storage, suggesting a phishing or malware distribution scheme. The PDF structure itself appears to be a link farm designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://huntic.ru/uplcv?utm_term=synonyms+for+job+satisfaction PDF link annotation
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/4eeed23a3577b1d154b2f23b9d23528f/82143647405.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/gibofanuru.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/a0ad437e78f0b07164b579fac59026c6/46014084146.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/91605533324.pdfIn PDF document text
    • http://www.biotanika.pl/upload/file/39250308747.pdfIn PDF document text
    • http://kvarkeno56.ru/userfiles/file/66606135425.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee31f4c4c8---rabakonusizubu.pdfIn PDF document text
    • http://mrs724.ir/basefile/drtiketcom/files/neledur.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/muriratimaviripo.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/6775999715.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/256hpl1moq576vu6f8sf7glgv3/xotosol.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/7dee63c5371fd8d65331392d88fe92b7/52732974388.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d5024f7eac3---xezupalapegesopuzetefam.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/jrbbu415memfv08esmlufp5e2l/datojumafonabazisipuboboz.pdfIn PDF document text
    • http://www.gdchgs.com/admin/img/files/porilosafitisalopobepaf.pdfIn PDF document text
    • https://maydangson.com/vietkiendo/upload/file/19456776811.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077a73d1c04e---desosodanuluxudij.pdfIn PDF document text
    • https://atl-50.com/files/file/99848600215.pdfIn PDF document text
    • http://taihegas.com/filespath/files/20210814060257.pdfIn PDF document text
    • https://elemental-ia.com/userfiles/file/nezakaniweduxibukirif.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/78396753945.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16079d7627c424---14072532255.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/ba02f0453e8978d62c498278badefef4/gebesusunugamelozov.pdfIn PDF document text
    • https://alixdemassy.fr/userfiles/file/puxurovagigurugideli.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160db7939036a2---3794572706.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a27404cbcf1---tunepugozizosawepoxer.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/3dlqi553v7uomfafsac9ps57nd/xuzedokixe.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_off0000d50c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD50C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1E 18252 bytes
SHA-256: e1f0b2ff7b105aca087df4978862af42c27edb2c63edbf408b2b8053da59c66b
font_02_sfnt_off00011c63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C63 10780 bytes
SHA-256: 77cad575913e63d893f2a0e60e5d4150ec34dd6da84e0cf07f994c5bc685b11a

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