Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d9fc09797eb8cc6…

MALICIOUS

PDF

69.6 KB Created: 2021-09-26 20:02:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: dc46a5e290fbdc25fc56aba240435c1c SHA-1: b00bae2d1e88aadd6e270b6d43f5c2175bbc4fa2 SHA-256: 0d9fc09797eb8cc60a3c8d84945acfed5c48d62ec99c3fe88f431d8cabfdda35
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting or are part of link farms, indicating a strong intent to redirect users. The presence of external URIs and the 'link farm' heuristic suggest the primary goal is to drive traffic to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 https://inmaabiladi.com/userfiles/files/doxub.pdf In PDF document text
    • http://cimkezes.hu/uploads/ckfinder/userfiles/files/53794295353.pdfIn PDF document text
    • https://hoangmailogistics.com/asset/site/files/94629382440.pdfIn PDF document text
    • https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/29301070305.pdfIn PDF document text
    • http://mrcubezpieczenia.pl/app/webroot/media/files/68624054522.pdfIn PDF document text
    • http://rheumatology.institute/upload/content/file/wuwulazafiwonamu.pdfIn PDF document text
    • https://beldapromosyon.com/calisma2/files/uploads/nerovitijodelivokeganola.pdfIn PDF document text
    • http://detikakdeti.ru/img/file/2223937099.pdfIn PDF document text
    • http://notariocprietoa.com/notaria/documentos/files/rajowilevutowipofo.pdfIn PDF document text
    • https://jensbrode.de/files/file/46031183285.pdfIn PDF document text
    • https://tranhtreo.com/images/ckeditor/files/10606746376.pdfIn PDF document text
    • http://tuyendung.btccorp.vn/uploads/files/zarorimokamag.pdfIn PDF document text
    • https://www.ojchamber.com/ckfinder/userfiles/files/66967562661.pdfIn PDF document text
    • https://reviewz.eu/app/webroot/files/userfiles/files/wamobugutupodiwoze.pdfIn PDF document text
    • http://konikanarrowfab.com/ckfinder/userfiles/files/pijunod.pdfIn PDF document text
    • http://briquettemachinery.com/d/files/tanoweluridaw.pdfIn PDF document text
    • http://capitaldanceacademy.com/userfiles/files/45802104858.pdfIn PDF document text
    • http://asr-net.ru/uploads/files/ratigewivokoweru.pdfIn PDF document text
    • http://x-site.by/upload/editor/files/zixovamo.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/34bf40e509a550ea793f2f0d317f79a9/migafokesiwujizomalufik.pdfIn PDF document text
    • http://tano-cable.com/d/files/patexegiditexe.pdfIn PDF document text
    • http://www.pacautomarketing.com/file/74964256811.pdfIn PDF document text
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16309419079531.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=monster+legends+apk+iosPDF 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_off0000b14c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB14C 15440 bytes
SHA-256: 0b77c5b9ee4adda223d42a9cef10d2dea7360020434f2e078f3d53c9286f6c99
font_01_sfnt_off0000d85d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD85D 10652 bytes
SHA-256: 5024f17dd16c6fe60279877bab4aaf7c83dfa21a2cb79eda02ef877edcf41641
font_02_sfnt_off0000f0ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1