Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7993b0530c30fae…

MALICIOUS

PDF

88.0 KB Created: 2021-10-09 13:08:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: 53486e4d39c8fe2c23c072ff53275b18 SHA-1: 5984fbf14e3d0a87f529b57281b0cc018e328e6a SHA-256: e7993b0530c30fae788a05242fc9a011f0f01f31b6c3cb8255f09dbe60ad7264
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://philabc.ru/uplcv?utm_term=new+world+order+mark+of+the+beast PDF link annotation
    • http://sentezetutmerkezi.com/upload/ckfinder/files/nogupixaletotu.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/xusuxuzorajumulomajanefe.pdfIn PDF document text
    • http://behtarinekhodetbash.com/files/files/70903988508.pdfIn PDF document text
    • http://tovicetour.com/FileData/ckfinder/files/20210929_0D22FE31D709C163.pdfIn PDF document text
    • http://nuovartea.eu/userfiles/files/poxutizodi.pdfIn PDF document text
    • http://wxmx.cn/upload/ckimg/files/202109141705595335.pdfIn PDF document text
    • http://hanasushi6.com/uploads/files/44468880549.pdfIn PDF document text
    • https://unicon-msk.ru/data/files/pibafuzovu.pdfIn PDF document text
    • http://pytextiles.com/userfiles/file/51165523062.pdfIn PDF document text
    • https://next-engineering.com/userfiles/files/juvewomafimaminatoteg.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/k9s0fjk8i8cdevc97tst26j9bq/31079990464.pdfIn PDF document text
    • http://ahzycw.com/upload_fck/file/2021-10-9/20211009130045384320.pdfIn PDF document text
    • http://arredamenticucinesiciliane.it/userfiles/files/31467778181.pdfIn PDF document text
    • http://jandebruijn.com/uploadimages/files/fogemotiwejoveb.pdfIn PDF document text
    • http://leebyunghun.kr/new/upload/board/files/53264057291.pdfIn PDF document text
    • http://swiss-ex.com/images/blog/file/rekawikufe.pdfIn PDF document text
    • https://www.bakkersvlaanderen.be/resources/plugins/ckfinder/userfiles/0/files/legan.pdfIn PDF document text
    • http://bociany.sk/media/file/maxilagojeja.pdfIn PDF document text
    • https://nayyaralidada.net/alpha/ckfinder/userfiles/files/72944312728.pdfIn PDF document text
    • https://abctranslink.com/ckfinder/userfiles/files/nipirinofobasum.pdfIn PDF document text
    • http://csc0851.com/userfiles/file/20210903191349_yk9i9k.pdfIn PDF document text
    • https://ivanamihic.com/files/kasuzaleruxudisom.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614191fc0f383---27757891578.pdfIn PDF document text
    • http://reguitti-engineering.it/userfiles/files/14446599389.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_off0000ef3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10750 19300 bytes
SHA-256: faf0c58a2f00bc1ff5eb1983dd0316fe681ec6f4e26e2a99e539528d93f910ab
font_02_sfnt_off0001399e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1399E 10716 bytes
SHA-256: b4c52a94b6a8ea19c959adbc60836aea2b87b24c5ae7bfb475c0e03fb44aae47