Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cdbeeace39aeb2d…

MALICIOUS

PDF

164.1 KB Created: 2021-09-06 10:03:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6e301843eedd369040bf61e5f944230e SHA-1: 74623686a9a872abd440d96fff84634bac3800f1 SHA-256: 1cdbeeace39aeb2d69f26c01b9e8fb9be9f74e303bc7e1e403deec313a613345
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to lure users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4788

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6e6183586---zefenelivekokedonebixej.pdf In PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/110466f90b9f8475d105c75c7ed6760e/50509717265.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/f3462db76e08fc3ff9781a10de94c618/sifolofomoniri.pdfIn PDF document text
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/kiwerapoxelifoluxudonebi.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/f0448bc290d576ea39ae51394b6807e7/lezuf.pdfIn PDF document text
    • http://atya.eu/files/file/38698492266.pdfIn PDF document text
    • http://chemicalengineers.ie/images/porugobeguloref.pdfIn PDF document text
    • http://whitedwarf.ru/public/images/ckfinder/files/jixosununitoxoma.pdfIn PDF document text
    • https://vitanov.rs/files/87238104656.pdfIn PDF document text
    • http://firegallery.ru/img/upload/838906454.pdfIn PDF document text
    • https://fiscalonline.eu/app/webroot/files/userfiles/files/78665470490.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/ifpu2rqkufeq18epunh23hftd7/vipodibepo.pdfIn PDF document text
    • http://bienbao.net/uploads/files/31299081649.pdfIn PDF document text
    • http://aligokdemir.com/resimler/files/sojupolezopalanupoguf.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/09d454a6ec4d78f410a07445afac9f32/85586006730.pdfIn PDF document text
    • http://xageunion.com/userfiles/file/22466473479.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160de2b39a02a6---kokige.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/id2fiamhq0fd70bit6e3c4mjmc/86415231694.pdfIn PDF document text
    • https://teenvolunteerhouston.org/wp-content/plugins/super-forms/uploads/php/files/e74d3836b631a30bfa6f1d415bed9675/46493879874.pdfIn PDF document text
    • https://tktravelkorea.com/FileData/ckfinder/files/20210703_DAC37E6F9093034E.pdfIn PDF document text
    • https://www.passion-rnd.com/upfile/files/2021/06/19/12817347372.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/609d567a778030992f8511e0bbeb82e3/68810854548.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/1d21akj92kq68tlbsp4gntid1q/gaduj.pdfIn PDF document text
    • http://qunjl.com/userfiles/files/pamupigodade.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=sachin+tendulkar+history+pdfPDF 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_off00023d1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23D1E 19540 bytes
SHA-256: 46d27e606287add730986f6c36124b11f0b5ff02a1faf8bf79ae67b6064d3341
font_01_sfnt_off00027062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27062 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1