Malicious PDF — malware analysis report

Static analysis result for SHA-256 12cd53c8ec7a8348…

MALICIOUS

PDF

124.9 KB Created: 2021-07-01 15:50:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a1f123bd850e9c31b9f434a796c7b702 SHA-1: e149c4ea13eb7db44fc207a9becf7b5a59f73d6c SHA-256: 12cd53c8ec7a8348e98ec8e56c1e2dc261305391d2b578b58b5ae9cd83d155d9
124 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to compromised WordPress sites and disposable hosting, indicating a link farm designed to distribute malicious content or phish users. ClamAV detection further confirms its malicious nature as Pdf.Phishing.Trojan. The embedded URLs suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier clean score 0.1722

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 https://catamma.ru/uplcv?utm_term=replacement+of+title+deed PDF link annotation
    • https://thedestinbeachhouses.com/wp-content/plugins/super-forms/uploads/php/files/d3eb2b56ac9d702fff3aa1e96c3a4528/budiserebiwat.pdfIn PDF document text
    • https://mkontakt.pl/dat//file/muxoborebipimukoxejojeto.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/redolazuluxuzusofi.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/e68d94a532e358dee97cb329234fbee3/98955635313.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16092006fc9a9a---32989858226.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/6a757re9ul5t1scn6fff4s7vgk/67225537978.pdfIn PDF document text
    • http://universalestetic.com/userfiles/file/mupatifodibotupokatezu.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/c67f0a6d2c1cf8e78715f40c68c45bbf/90963713798.pdfIn PDF document text
    • https://avonsteel.com/UserFiles/file/golokirixeresaxisumaj.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/ea2d744ee7b05cad8ff5919df057185b/72611023707.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/ga8kdpccvp3gbe4c6k760amcu2/62839819674.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16094218983fd5---dulegepixisivasanoveru.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d8c11990d75---vujesazotonunarakapobus.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/62330697435.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/vajolirajawejovisep.pdfIn PDF document text
    • http://zulaikhatextile.com/userfiles/files/2817739341.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c4936353331---fitimatad.pdfIn PDF document text
    • http://arablift.net/userfiles/file/xipuxazelux.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a396aaccf0b---44623556321.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/o7o7d1d205r0223968uoohl02u/tovukiwadokupu.pdfIn PDF document text
    • http://ansonseatery.com/uploads/files/nopopowikusizujusumuwuwet.pdfIn PDF document text
    • http://ecole.ru/text/images/file/faxomawe.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/67686165918.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16078c244185d3---79606945132.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/8b077bab1f2951ce15d47187be4f21d0/nedodawu.pdfIn PDF document text
    • http://webinside.pl/userfiles/file/zuxupug.pdfIn PDF document text
    • http://s292376414.onlinehome.fr/datas/imgmail/file/padobepunijapifavolaja.pdfIn PDF document text
    • 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_off000196f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x196F4 19200 bytes
SHA-256: a0547f1d5b1042fa6684ec6cf6947441833c3cc4764701bdd307494656d75bbc
font_01_sfnt_off0001c8d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C8D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1