Malicious PDF — malware analysis report

Static analysis result for SHA-256 3386ca78795c3bc6…

MALICIOUS

PDF

80.4 KB Created: 2021-10-20 03:51:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: fe009b0157aa8b0fe5e378609d973ee5 SHA-1: 657b51368be88dbc1264226e204129d1843b8547 SHA-256: 3386ca78795c3bc60426a7c74e701a5b840ae4b25aaa549b28634efd16699460
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as a phishing trojan. It contains numerous embedded URLs, many of which point to PDF files hosted on potentially disposable domains, suggesting a link farm or phishing lure. The PDF structure and embedded content indicate an attempt to redirect users to malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4864

Heuristics 4

  • 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
  • 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://concertwristband.com/resimler/files/xeluwule.pdf In PDF document text
    • http://cdenito.net/userfiles/file/sifujetazizaki.pdfIn PDF document text
    • https://slavicchurchmississauga.com/fck_upload/file/sekunumiwome.pdfIn PDF document text
    • https://computerzone.pk/file/36188138504.pdfIn PDF document text
    • https://camphacement.vn/upload/files/sakiripuwoworekenodaxawop.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021090708523647.pdfIn PDF document text
    • https://movimientofamiliadejesus.com/images/uploaded/file/8254876669.pdfIn PDF document text
    • http://suncitygroup.ir/basefile/suncitygroupir/files/bidomuranevom.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/vamituxutujobi.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/kanimer.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/30783305129.pdfIn PDF document text
    • http://aerotherminsulation.com/userfiles/file/28609747953.pdfIn PDF document text
    • https://ssvacancy.com/ckfinder/userfiles/files/fojirijilu.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/91415690165.pdfIn PDF document text
    • http://tubelessons.net/cms_images/file/79974503557.pdfIn PDF document text
    • http://s-pack.kr/userfiles/file/20210905203515.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/16165871379f9a---38806665843.pdfIn PDF document text
    • http://altadirezione-consulting.it/userfiles/files/pasidotudujapu.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/p3qlv9m4103758guboa0jadnne/jujerolebewi.pdfIn PDF document text
    • https://www.lipca.com/ckfinder/userfiles/files/72733792069.pdfIn PDF document text
    • http://fsgzb.com/upfolder/e/files/20211007144601.pdfIn PDF document text
    • http://willajarmar.pl/userfiles/file/83624889843.pdfIn PDF document text
    • http://tkhomedeco.com/assets/uploads/ckedit/files/20210905113741.pdfIn PDF document text
    • http://michigan.easydefensivedriving.net/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/xixofizawovu.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/jebafusiketelori.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/6Zflnl449io/uplcv?utm_term=pokemon+platinum+randomizer+download+gbaPDF 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_off0000e34f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34F 11048 bytes
SHA-256: 492545ba81f4fe490126ffdc1cf3cf45c84070fc5985dd50a792c23474c2b506
font_01_sfnt_off0000fc9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9A 17684 bytes
SHA-256: 42cca86bc96574a1d514f4127b47e0c7f512bb1d37b9f7718d2fff4df31966f1
font_02_sfnt_off00012af7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AF7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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