Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd0feb7eb2d09d3c…

MALICIOUS

PDF

81.6 KB Created: 2021-09-04 15:06:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: bb466bc32a7375da1f163436e8fcf5ec SHA-1: b7ac8c428fa76daedca095996a0cce443f6146b2 SHA-256: fd0feb7eb2d09d3cf7caa6aa8f9405b8ae138ece7ba676d808ef443bf37da5cf
164 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 and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://smidgel.ru/uplcv?utm_term=depreciation+chart+as+per+companies+act+pdf PDF link annotation
    • http://rafaelstore.ru/upload/files/75757119394.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160783e4725e97---puxunirenurite.pdfIn PDF document text
    • http://urparitet.ru/admin/ckfinder/userfiles/files/10673094429.pdfIn PDF document text
    • http://opuspointpartner.com/ckfinder/userfiles/files/41495604937.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be33dbe9eed---38616185273.pdfIn PDF document text
    • https://groupunsur3.com/contents//files/47789252602.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1610ff32a80a82---kixenidika.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ac20a23442d---48251298382.pdfIn PDF document text
    • http://eaupureinternational.com/userfiles/file/96507230671.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/3aa8c752550f743f9d1eca6beee99c46/nirativilazajekumegodif.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/58a808a8f537960759d49fcd6d3d1f7c/63765740011.pdfIn PDF document text
    • http://halmar.info/userfiles/file/kupipizijufevuxuf.pdfIn PDF document text
    • http://cathyourhair.nl/js/ckfinder/userfiles/files/78871017196.pdfIn PDF document text
    • https://likeevent.it/writable/public/userfiles/file/99708444881.pdfIn PDF document text
    • https://ntiverification.com/userfiles/file/19593403366.pdfIn PDF document text
    • https://gs-hemeringen.de/ablage/userfiles/files/kimugotipuger.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/ca31e25e5d5f9e70deb195f913eb03c2/87717177415.pdfIn PDF document text
    • https://skyzoan.com/cake/beta/userfiles/file/82080185266.pdfIn PDF document text
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/66ac7593b310b8a57a67e4a0697e3e02/28248556338.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160811937383cf---70044276529.pdfIn PDF document text
    • https://venefoil.com/ckfinder/userfiles/files/guwotitelidobivugozapapu.pdfIn 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://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_off0000d977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD977 17936 bytes
SHA-256: cf0982e69ebef1070d310e2fc963695c1e02c473fe2c885931a0e49fa1c33553
font_01_sfnt_off0001081a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081A 10840 bytes
SHA-256: 8091644a6be084bba3af14c8bc2b42328697ffb4c3bbe4467506363045a1269d
font_02_sfnt_off000120e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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