Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0b219b01d24acdc…

MALICIOUS

PDF

79.4 KB Created: 2021-09-06 13:28:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 5d680b9630887a96e75178ba196a3896 SHA-1: 057fb73f34ca2b418f4605cb4a75edee72b14ce2 SHA-256: e0b219b01d24acdcf8836b97142b238b778530bb95e91b92d9d3e37162f18fc5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://geredekombiservisi.com/userfiles/file/vigiziwepevubalaxum.pdf In PDF document text
    • https://nutritie-metabolism-sanatate.ro/app/webroot/files/userfiles/files/noxasaretakerulijesufa.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160752b0be16fd---53849746902.pdfIn PDF document text
    • http://ncdesign.it/userfiles/files/gawaminezami.pdfIn PDF document text
    • http://nationalcoopadvisors.com/userfiles/files/35467833864.pdfIn PDF document text
    • http://giasuminhtam.com/Images_upload/files/15353530203.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/32be6cb0f4b491548e1db08168d85b1c/sarenebujop.pdfIn PDF document text
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/xufugupaxuledilev.pdfIn PDF document text
    • http://indexone.ru/upload/file/witukejodudaguvojatotas.pdfIn PDF document text
    • http://lbtech.kr/upfile/files/goxotogawezalobefujavesek.pdfIn PDF document text
    • http://gulfcoastlist.com/userfiles/file/bagogarajonapedomifagiru.pdfIn PDF document text
    • http://bjjiffy.com/upload/92851051102.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/xubokoluxufuxuj.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dfa21292923---nakanib.pdfIn PDF document text
    • https://gizaviation.com/uploads/files/56202692084.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/takusabifipewoge.pdfIn PDF document text
    • http://aromamahabaleshwar.com/ckfinder/userfiles/files/99248670841.pdfIn PDF document text
    • https://sananselmo.com/wysiwygfiles/file/mariwigexezumovojoru.pdfIn PDF document text
    • http://comp-art.ru/userfiles/file/35790796120.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d1ea444dd4a---59676935610.pdfIn PDF document text
    • https://norservis.com/files/files/vezudepokanulesozurujexa.pdfIn PDF document text
    • https://birudongker.com/contents//files/zusiborexupa.pdfIn PDF document text
    • https://umiyawoodworks.com/fckdb/userfiles/file/13089889017.pdfIn PDF document text
    • http://hakkabrothers.com/userfiles/file///30544421109.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=phantom+4+pro+plus+manualPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBEB 10472 bytes
SHA-256: e7173b69b577d7076c676c25838d2aed51902b27eda42f8d909812858189c328
font_01_sfnt_off0000e388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE388 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fb9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9A 20020 bytes
SHA-256: 63fbffc6a3605916cd3286f852055cee1eefd5ec9353d97a3f9550941f09a969