Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceaeaff8a980e9dd…

MALICIOUS

PDF

93.9 KB Created: 2021-09-15 14:25:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 898effde8950ce12bbd6eb8a42ca3917 SHA-1: 765f9a6a04bee99b7078f5c3d44c3a915db3c008 SHA-256: ceaeaff8a980e9dd18527c3ca248b9f4667ef56c299fd2572cf36c0545c33af6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://istihdamhaberleri.com/upload/ckfinder/files/1121399369.pdf In PDF document text
    • https://adikkeempat.com/contents/files/fakoxovubuw.pdfIn PDF document text
    • http://cephedanismani.com/images/pages/file/22361474445.pdfIn PDF document text
    • https://livresdarts.com/ckfinder/userfiles/files/82453678158.pdfIn PDF document text
    • http://infinivideo.hu/sites/infinivideo/files/46867342125.pdfIn PDF document text
    • http://xn--80aadcnaeutgftohcogh8i8dsc.xn--p1ai/pict/file/85988689847.pdfIn PDF document text
    • http://goldartline.ua/userfiles/file/11314458159.pdfIn PDF document text
    • http://spbi.cz/res/file/zikuzafarose.pdfIn PDF document text
    • https://ysh.my/userfiles/file/rinajiforejameragisunawo.pdfIn PDF document text
    • https://letstravelforacause.com/miet/assets/files/kujevokuwekanogegejiwinu.pdfIn PDF document text
    • https://urbanshapes.in/userfiles/file/53009735947.pdfIn PDF document text
    • http://protetyka-lublin.com/images/wyswig_images/file/83370671772.pdfIn PDF document text
    • https://tfsroanoke.com/home/tfs/public_html/new/ckfinder/userfiles/files/ximabilegujegegowa.pdfIn PDF document text
    • https://kapokcmassage.com/uploads/files/202109071313418910.pdfIn PDF document text
    • https://unitedfightalliance.jordanadams.com/ckfinder/userfiles/files/14047950808.pdfIn PDF document text
    • http://nessium.fr/userfiles/file/65997703786.pdfIn PDF document text
    • http://bradzo-ep.com/uploads/files/55467517890.pdfIn PDF document text
    • http://gildiamasterov.ru/userfiles/file/tobude.pdfIn PDF document text
    • http://boston.pl/fck_pliki/file/55426858457.pdfIn PDF document text
    • https://yam-token.com/business_school/uploads/file/dosasevuzalin.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141319ac1156---sokopa.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/0dca0e5bc3bddabe41be3f446afa5ad0/popewovuwudiniluvami.pdfIn PDF document text
    • https://umutisi.com/umut/upload/files/42119984729.pdfIn PDF document text
    • http://kiko168.com/UploadFile/file/20210914061546957.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/tulugategexikojuwojim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=six+gun+gang+showdownPDF 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_off00010a08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A08 18404 bytes
SHA-256: cc9b2b17d3a0ea4d19cddd3f0e42a2d38ab18c0777077d0fee96037b08bd06ed
font_01_sfnt_off00013a06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001521d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1521D 10516 bytes
SHA-256: 8f69f5320f0aef52d3e5c6daa464ac57849ec3aea32ca0e304ef94fc8580fcf4