Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbe0964079f18481…

MALICIOUS

PDF

90.1 KB Created: 2021-09-16 02:09:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 78fdd092f7cba79611e2dcff1f261e85 SHA-1: 8d2416fa56343eb4cc24e9f2caf5ec0ae0c0d4f7 SHA-256: fbe0964079f184810d32e7003708f723b802088670955b47adafb6ec272c181e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded URLs pointing to various domains, suggesting it functions as a link farm or redirection mechanism. The presence of external URIs and the overall structure indicate an attempt to direct users to potentially malicious external content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nomylo.ru/uplcv?utm_term=age+of+chaos+hack PDF link annotation
    • http://sun-green.de/ckfinder/userfiles/files/89307534526.pdfIn PDF document text
    • http://www.bongbansaigon.com/uploads/files/99428256322.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-9-8/20210908100013580442.pdfIn PDF document text
    • https://fcimoveis.com/imgs/file/wurusoditenabes.pdfIn PDF document text
    • http://cautrucpalang.vn/webroot/img/files/94100064512.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b9fb3d591c---34830428976.pdfIn PDF document text
    • https://alteanetworks.fr/img/file/84518251901.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/54714569898.pdfIn PDF document text
    • http://dgjinhak.kr/DATA/upload/files/202109160433009626.pdfIn PDF document text
    • https://rm-parketi.si/uploads/10798741937.pdfIn PDF document text
    • http://grandioso.asia/editor_upload_image/file/vapezejaner.pdfIn PDF document text
    • http://tribo.kz/userfiles/File/36435136801.pdfIn PDF document text
    • https://tucarrorentacar.co/ckfinder/userfiles/files/sofagujamopojabefusubeva.pdfIn PDF document text
    • https://kawanmto.org/contents/files/nujaja.pdfIn PDF document text
    • http://sanxuatbanthinghiem.org/app/webroot/uploads/files/fafizijula.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/xuzojukidebatawat.pdfIn PDF document text
    • http://ih-consultant.com/ckfinder/userfiles/files/dugitarozijazipopul.pdfIn PDF document text
    • http://ablerexthailand.com/userfiles/files/73916976862.pdfIn PDF document text
    • http://oresteruggiero.com/userfiles/files/26812339815.pdfIn PDF document text
    • http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wuxeturudukirejexipudotot.pdfIn PDF document text
    • https://jungleflightchiangmai.com/Uploads/files/77231172611.pdfIn PDF document text
    • http://air-con.ru/upload/files/14718109014.pdfIn PDF document text
    • https://doanandieuduong295doson.vn/namthuan/images/news/files/tematodutunepupetemunexe.pdfIn PDF document text
    • http://hongdacable.com/d/files/tijodalamejajow.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_off0000fbd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000113e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E2 18588 bytes
SHA-256: 171393a3d8cdd9172f019d5b0364f14a55c24e5528585aabf025d1fc1fe0f1ce
font_02_sfnt_off000143f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143F0 10248 bytes
SHA-256: d889fc808527a852c5bb759198f817efc4101daa6290f38eb1784ad6fa18dc96

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