Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4cd661bd95c46a3…

MALICIOUS

PDF

75.4 KB Created: 2021-08-19 01:29:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5b120b9d1632b81c7fec51cdf821d30a SHA-1: c4e299aa4b65c30fe72830eae1248412acfcd704 SHA-256: d4cd661bd95c46a384eaaadbb63fc70489213973eff7ad90570a6f12e6145189
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. Heuristics indicate the PDF contains a link farm pointing to multiple compromised WordPress upload directories and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The embedded URLs are designed to redirect to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://phdpecs.hu/userfiles/files/zerosorukedoxevefiragipa.pdf In PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16094841957a7c---58976851099.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099f0091c8a0---89680941102.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d921848b6bd---2096493285.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9836bef65---dikezewadodazawas.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/946c61f4c3ecfb6c1dd95978d5c49a22/69301560117.pdfIn PDF document text
    • http://digifast.cz/userfiles/banuwikekami.pdfIn PDF document text
    • http://picassogift.com/Uploadfiles/files/44002435756.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/60e85729c74cfff0f900211a267d98ec/24223283866.pdfIn PDF document text
    • http://logisticsnetworks.net/ckfinder/userfiles/files/88914161639.pdfIn PDF document text
    • http://williamshudson.org/clients/3/35/35bf74ce48b5c120232fd40fb4fe3e45/File/lofotep.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/nld30qt0auml9cdev01mvskgv5/10297256655.pdfIn PDF document text
    • https://digireg.com/upload/7855573616.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/5500b26f10441f4f95adf6cdec3becfa/32197514078.pdfIn PDF document text
    • http://mingmitrcoffee.com/user_img/files/rafufejegafo.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d04d6f18c47---zezidizafejowumasozigat.pdfIn PDF document text
    • https://hogozaty.com/ckfinder/userfiles/files/zikiderotirid.pdfIn PDF document text
    • http://borisovhlebprom.by/var/upload/file/zarinegedaxuwotogakazuba.pdfIn PDF document text
    • http://kondicionery-elektrostal.ru/upload_picture/file/99740986542.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/fd92f5d11078676412f1fb4bd2b8c866/tozozaweresodaj.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/47339156331.pdfIn PDF document text
    • http://bukharaalpharetta.com/sites/default/files/file/jesepigonugapi.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aba15020b43---zagabevetafomefumovoba.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160825e3b53773---tuvokafakepazubotidebazup.pdfIn PDF document text
    • http://jl-vacuum.com/upload/files/8749786362.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=que+es+el+diagnostico+segun+sampieriPDF 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_off0000ddaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAF 17056 bytes
SHA-256: 4e73ad73f1cdea1022c5f1ac8c20af9488362670b3de927d9a0a92280adde5cd
font_01_sfnt_off00010941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10941 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1