Malicious PDF — malware analysis report

Static analysis result for SHA-256 f567f53e932f9881…

MALICIOUS

PDF

78.0 KB Created: 2021-09-10 07:07:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 8d3bce7874ff15a670acdbe78a6a48b8 SHA-1: a548ee0d55167def240b5f6c5b4d9bf5aa12e1f9 SHA-256: f567f53e932f9881e672d1ca1b949b2b38c15d44a41f8fe2f4e41d20cab80772
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to a link farm, a common tactic for phishing or distributing further malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, suggesting the PDF is designed to host many links on disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 5

  • 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.
  • 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://hsaltsj.com/uploads/files/60206787455.pdf In PDF document text
    • https://xn--80apefbdm9ah5g.xn--p1ai/userfiles/pupedodigot.pdfIn PDF document text
    • http://olech-rzeszow.pl/userfiles/file/71852823204.pdfIn PDF document text
    • https://congnghiepxd204.vn/upload/files/29496109014.pdfIn PDF document text
    • http://thcsnguyenvanhuyen.hoaiduc.edu.vn/ckfinder/userfiles/files/78718009763.pdfIn PDF document text
    • http://arhive.np-sp.ru/img/file/pilunozaxakotu.pdfIn PDF document text
    • https://myparrotfood.com/user_files/files/97777817482.pdfIn PDF document text
    • https://pomacanthe-art.fr/imagebeforeafter/files/80386254121.pdfIn PDF document text
    • https://sibois.eu/userfiles/file/piruboja.pdfIn PDF document text
    • http://www.deewanalarab.com/up_imgs/saloradimo.pdfIn PDF document text
    • http://www.dawnrotaryclub.tw/UserFiles/files/1219658967.pdfIn PDF document text
    • https://norservis.cz/files/files/vofoz.pdfIn PDF document text
    • http://spain-ex.com/images/blog/file/67985290719.pdfIn PDF document text
    • http://1carl.com/userfiles/file/34807977447.pdfIn PDF document text
    • http://fcraregistration.com/UploadedData/file/ditalat.pdfIn PDF document text
    • http://studionegrelli.it/userfiles/files/rajamafujamirumaf.pdfIn PDF document text
    • http://studioambienteterritorio.it/userfiles/files/35023768117.pdfIn PDF document text
    • http://webinaris.biz/ckfinder/userfiles/publics/files/85750746784.pdfIn PDF document text
    • http://studiolorenzoni.eu/userfiles/files/fapufejajuj.pdfIn PDF document text
    • http://mundialimportweb.com/userfiles/file/41173723886.pdfIn PDF document text
    • https://1snrpaulista.com.br/ckfinder/userfiles/files/tifulitepivabalometamupez.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/a2b3a881d38b6e1f9812109aac763f24/10479937886.pdfIn PDF document text
    • http://mindentudor.hu/userfiles/file/notopaluwomulogu.pdfIn PDF document text
    • http://pescepiana.eu/userfiles/files/momepogopow.pdfIn PDF document text
    • http://fxmeat.com/upload/file/350c5c1d683426a07f53c1d80a68e988.pdfIn PDF document text
    • http://drsuthichai.com/userfiles/files/vovidabogenaxoji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=turbo+sms+bomber+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_off0000cbf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE407 17564 bytes
SHA-256: 5759e533295c0a965b74fe96b19561e0de433d4887176460705f97d4619d46cf
font_02_sfnt_off0001115b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1115B 10744 bytes
SHA-256: 0671a38ddb1b27427c04df397b79f26b182b5f29800ed275a4b2d56832b27193

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