Malicious PDF — malware analysis report

Static analysis result for SHA-256 14a00672dddffb1e…

MALICIOUS

PDF

74.8 KB Created: 2021-09-20 01:18:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7a8ee146b2c61bc973056f189df49f67 SHA-1: 40f007cc517bd77ccd38148b83a1a9ca1e01f0ea SHA-256: 14a00672dddffb1e4c24858024f80cb68d46dd18d5431e6c6bddd0336b9cab0e
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one heuristic specifically flagging it as a link farm on disposable hosting. The primary attack pattern involves directing users to a potentially malicious PDF hosted on a compromised website, likely for phishing or to deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5898

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://studioguatta.it/userfiles/files/mivodokuwumipiwetakal.pdf In PDF document text
    • https://wildnaturetravel.com/File/2634988494.pdfIn PDF document text
    • http://studioarchperissinotto.eu/userfiles/files/10220846003.pdfIn PDF document text
    • http://wamer.org/userfiles/file/44372773197.pdfIn PDF document text
    • https://nezrenpin.com/calisma2/files/uploads/tubavaj.pdfIn PDF document text
    • http://4x4autok.hu/userfiles/files/jobiso.pdfIn PDF document text
    • http://jiehuist.com/userfiles/files/gokidukewoxetagaxejedul.pdfIn PDF document text
    • https://castilloexterior.org/ckfinder/userfiles/files/rosizegevo.pdfIn PDF document text
    • http://evo-models.com/uploads/userfiles/files/mojavikiv.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/ekcpua1n0trr3h65lcu3k52rq7/92656176426.pdfIn PDF document text
    • http://gatewayhotelbangkok.com/upfile_hotel/files/maponafud.pdfIn PDF document text
    • https://jogamiskolc.hu/ckfinder/userfiles/files/xufis.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/xapikiwuforuxatedimu.pdfIn PDF document text
    • https://newline-eg.com/userfiles/file/jeforodatedakusunakogaje.pdfIn PDF document text
    • http://urgentcarepb.net/userfiles/file/xirok.pdfIn PDF document text
    • http://ambulatorioveterinariocamali.com/userfiles/files/98911865795.pdfIn PDF document text
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210917200233.pdfIn PDF document text
    • http://thietbidienmpe.net/upload/files/meroxevegibise.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d12d1e5b73fee9ca433b9dccd1b1a636/41378702398.pdfIn PDF document text
    • http://kimsanghun.com/upload/userfiles/file/2021917051235298.pdfIn PDF document text
    • http://studiogeologicotrilobite.com/userfiles/files/kevofulosiduzoxukepade.pdfIn PDF document text
    • http://findusafranchise.com/files/files/94208017588.pdfIn PDF document text
    • https://badanie-wody.pl/galeria/file/30030810976.pdfIn PDF document text
    • https://alley.52886.tw/uploads/files/87028725208.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=android+g%C3%B6r%C3%BCnt%C3%BCl%C3%BC+arama+ayarlar%C4%B1PDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD992 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A4 17504 bytes
SHA-256: 2edbb05bbf2b2d8a5b73afaf63b9ec7a0b2b0085eecf02a16d3334f79773c1e9