Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b55c6015649ca2a…

MALICIOUS

PDF

91.1 KB Created: 2021-09-17 13:05:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: a9e1ae06ade212b6cd1f6f0122f48a2a SHA-1: 9b2a694688b417066eb9c5f45d75590bc13a88ca SHA-256: 5b55c6015649ca2a8116595e69d1531e09b18b0b4e978947c217e336ecc55247
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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 https://cructi.ru/uplcv?utm_term=ice+queen+2005+full+movie+download PDF link annotation
    • http://swaptoys.org/ckeditor/uploads/files/zopekalipixelujugezege.pdfIn PDF document text
    • http://ngocvietbungalow.com/upload/files/77699795498.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/teniliziduvufolekumuwuve.pdfIn PDF document text
    • http://whatifitspossible.com/ckfinder/userfiles/files/lumogegagaw.pdfIn PDF document text
    • https://madspot.dk/ckfinder/userfiles/files/wugutekeginubizofafoguv.pdfIn PDF document text
    • http://whygzy.com/Media/Uploads/files/89296096767.pdfIn PDF document text
    • https://www.casestilistas.es/ckfinder/userfiles/files/puboloj.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/t6ubotto25n17omn2c9u4dvav3/95257544464.pdfIn PDF document text
    • http://ewhamd.net/upFiles/ckeditor/files/morabidi.pdfIn PDF document text
    • http://nincity.de/inline/file/makuzarol.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/16131a5b944a0a---bezozu.pdfIn PDF document text
    • http://www.cavice.fi/tiedostot/files/kirixobipolurerogogorago.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/161378a0468605---50141265919.pdfIn PDF document text
    • http://ort168.com/upload/ckeditor/files/74932758757.pdfIn PDF document text
    • http://hondasushi.com/uploads/files/tepeverivi.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/f01a41f5e31f9bd5601de115dfd4bc6b/41955842378.pdfIn PDF document text
    • http://kelkenaghshband.com/app/webroot/img/files/37770022389.pdfIn PDF document text
    • https://hoangphatdanang.com/uploads/image/files/xixab.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/636bb4a5821cb97faeff7b7658953080/11229706711.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/50025ddb3504a99097ccd16acf7d9a03/70337193753.pdfIn PDF document text
    • http://houtackers.nl/userfiles/file/torivifajubexikov.pdfIn PDF document text
    • http://rlponder.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/69448396351.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE174 18972 bytes
SHA-256: 677313a37545e45cb8186c37e9de2349a1a82501d1cd8bcf3c1ae318048589a2
font_01_sfnt_off0001006e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1006E 17408 bytes
SHA-256: 6d24c3c44a5eb650acb15c321935857a5f1086c97226a0446f736043d8836f77
font_02_sfnt_off00012d1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D1A 10996 bytes
SHA-256: 6ce89c02c79f6de28984dde4a52ef426e875a8f7ed8dd6763996ab5a6239601e
font_03_sfnt_off0001468b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1468B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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