Malicious PDF — malware analysis report

Static analysis result for SHA-256 eff2ef6486f536a6…

MALICIOUS

PDF

90.2 KB Created: 2021-09-15 14:25:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6d9e5f896c3eac35b4e9c84cd8a89bf9 SHA-1: 90b53d89ff3e703cec8791ebdfaaebd546ed6ccd SHA-256: eff2ef6486f536a67ab8cc894801f30db277dc1a68742e3c0ff632c3add927c6
124 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous embedded URLs pointing to potentially malicious content. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7320

Heuristics 4

  • 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
  • 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://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

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