Malicious PDF — malware analysis report

Static analysis result for SHA-256 d99baf19cc1ce3aa…

MALICIOUS

PDF

73.7 KB Created: 2021-09-03 15:56:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a77b9e8047aa21980387e7b0eea86fff SHA-1: 9d849eef882945fbac18a46747ce91641fb213c4 SHA-256: d99baf19cc1ce3aaf22e5f745314a04700a2c9494e6faa36f92d689f20ba54ed
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, presenting numerous URLs that point to external resources, some of which are hosted on compromised WordPress sites. The embedded URLs and the nature of the link farm suggest an attempt to direct users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6326

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://wearefamilypalestine.com/clients/3/3b/3bc38fc23f9ffb54b20226cbd6ad6ce3/File/xadukamiromaxekolutegax.pdf In PDF document text
    • http://islandpointfl.com/userimages/70612761146.pdfIn PDF document text
    • http://wrhs1967.org/clients/6/61/617565fc8afb9cc6d18abf932d248b7a/File/60979612986.pdfIn PDF document text
    • http://budaikepkeret.hu/uploads/file/budokitufugivifol.pdfIn PDF document text
    • http://palenice.net/obrazky_clanky/file/sazenasixuzorekep.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/80596530204.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/6nivvl2t3uok19l1uuuclhp4m0/sovobaximukam.pdfIn PDF document text
    • https://tigaintan.com/contents/files/juzexeziro.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/dvt1pgl5ai90cdfud67g4eiift/74071659555.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/f8865f802197c6999bd6d234c99ce4c7/10941280375.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160864da58afd2---40254610905.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/137f2620da45bfaf44be4fc9b1c2031f/54628584804.pdfIn PDF document text
    • https://coil.hk/upload/files/bilogaruw.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a317d40b772---paliduwoxo.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/roduzaf.pdfIn PDF document text
    • http://partnerplus30.ru/images/fornews/files/simezaxune.pdfIn PDF document text
    • http://circolonauticofavignana.it/userfiles/files/27590032996.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aa2a07acb71---tovoda.pdfIn PDF document text
    • http://anapro.com/ckfinder/userfiles/files/resomufi.pdfIn PDF document text
    • https://hashtag.school/userfiles/file/nukalexowovor.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6c5b0f722---nanamilub.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/16083bfd40e734---11346673033.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609817c51be7f---64364152860.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/73fc3046099b26a51496f8fbdfeb8ae7/41179613642.pdfIn PDF document text
    • http://orderbestwings.com/uploads/files/wokizibedajanijoliwusuwuz.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16070684d2f056---tajoji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=i+am+aldolpho+sheet+music+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_off0000e392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE392 17428 bytes
SHA-256: c555382478bfd066db5ad1f111fc18abbd3575ba6bf2bdb1866e9189602935ce
font_01_sfnt_off00011091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11091 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1