Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6fb13a76bd4611b…

MALICIOUS

PDF

70.8 KB Created: 2021-06-21 20:18:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 65e1476749fbb50cb8b69ee3916c7f1e SHA-1: e64584ec1bc6b045047401199e2e2f3d70bd696c SHA-256: e6fb13a76bd4611b68f54240c09da2b8e411287a7562bd12cffffc7698f0391a
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to compromised websites, likely to facilitate a phishing or malware download scheme. The presence of a 'download button' lure further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 https://archism.ru/uplcv?utm_term=kai+greene+ebook+free+download PDF link annotation
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606d132a0af89---51383551350.pdfIn PDF document text
    • http://hkt-optics.com/hkt/images/userfiles/file/mazadapini.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/0aa857355d195899eef1197bc2416e77/tisikabopozug.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/qm6nsja39mejebpglacn52hpfb/kilezezososemiluzuvubugo.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/a9b8e8df30be936ece68c16a6c171d8a/viberiwadeduzeru.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b109ed3c250---67165789456.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/ledasoti.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/4uudvpq5407rolgq05eb7or4q2/29004212407.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607fccd7279a0---muwezedamomodoletuvoro.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160890ce6930b1---tawusemadurakopibope.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a06f25b2cc0---20532187808.pdfIn PDF document text
    • https://tonwen.org/userfiles/file/rivunawuluxopilesezobo.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/fa5273849a7f046ee65c5f4fc3e65e8a/29919916831.pdfIn PDF document text
    • http://bjjiffy.com/upload/75334719533.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609329e5570d4---lizupe.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd447f9b484---koxemorujakaf.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/latetasajijegixaxuw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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://scripts.sil.org/OFLIn 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_off0000be88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE88 5160 bytes
SHA-256: 928d3bd0876d8788766505e7a15af62607e16b6fe2296a8360152d7cbbc47556
font_01_sfnt_off0000d042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD042 11532 bytes
SHA-256: 510efabfb8982174e647a34d358ec579b561227529880ef485f0a7e257cebb52
font_02_sfnt_off0000f7e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E7 16036 bytes
SHA-256: 9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940

Open this report in the interactive analyzer, or submit your own file for analysis.