Malicious PDF — malware analysis report

Static analysis result for SHA-256 0de6cbe10565327c…

MALICIOUS

PDF

81.9 KB Created: 2021-09-05 17:33:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d6c495bb6a265ad25722c3d247d9a0bb SHA-1: 53d534d2c322411eae368e795460dcaf730d510e SHA-256: 0de6cbe10565327c5a4452123ff4058dab31a3a77f7b705a27c74e79387e094f
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the PDF acts as a link farm, directing users to multiple external websites, some hosted on potentially compromised CMS platforms. The presence of numerous unknown URLs suggests a phishing or scamming operation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://kapelski.pl/userfiles/file/59076443893.pdf In PDF document text
    • http://cpils.com/userfiles/file/7429841850.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/jomogajusowevisalajura.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ec8a39aa5---ronarikeluga.pdfIn PDF document text
    • http://apsons.eu/files/file/84787643931.pdfIn PDF document text
    • http://myphamso1.net/uploads/files/buwupopalinegel.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/katisemefuj.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/9d61421fc4db11f6cfa6796288e3ae14/rufujijekaropiwa.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070c3651cac7---rurekadefokoguvebisi.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e01bd8cd6---70819439734.pdfIn PDF document text
    • https://ocw.tw/uploads/files/mekufotidusumida.pdfIn PDF document text
    • https://samoinstitute.mn/uploads/assets/file/mubekoranega.pdfIn PDF document text
    • https://ropaalmayoreo.com/images/userfiles/file/96697487806.pdfIn PDF document text
    • http://teaandtiara.ca/clients/c/cf/cffd5a667a547ddf6f7ed7e454f715b7/File/83569582228.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16089441df03b3---wixazesisatapilixum.pdfIn PDF document text
    • http://www.cpnatacao.pt/backoffice/ckfinder/userfiles/files/bejokofafeziti.pdfIn PDF document text
    • http://hydrem.ru/images/file/mofidaz.pdfIn PDF document text
    • https://andymullinscommercial.com/home/andy/public_html/ckfinder/userfiles/files/92815629620.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a342445a329---fosovovidawu.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/repolosidivujulivixori.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/68977700641.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/05fe44d326b9ae6fc1ae83ca1f418534/15075951164.pdfIn PDF document text
    • http://raisemoneyonline.org/clients/6/69/691275cf9a36cab982b2498ebdc715be/File/13771116576.pdfIn PDF document text
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/jitilopudidajowuxipoz.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075f5c3623f3---javaguwuruvelegoz.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160755afec590b---wiredap.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/he77496mfja1d7q21ggv1hbbd5/pemokivekegamusajeziginak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=toyota+land+cruiser+2005+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_off0000dcaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAA 16596 bytes
SHA-256: 42112b1863e07f26f03653a1351aab9aa9f62f2da04c282e12b8bda28c0c9967
font_01_sfnt_off000107cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CD 11084 bytes
SHA-256: d1660c16b083ebfea0cc328b17732b8a462be29b5f992c1479585d9da26767c6
font_02_sfnt_off000121c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1