Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9aab4a0f4bcbb78…

MALICIOUS

PDF

94.2 KB Created: 2021-07-31 00:41:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3ea37c49a789594a2027c50d88f291fd SHA-1: 7355fb703f3e226d61692af3e4178bfc593d2a62 SHA-256: e9aab4a0f4bcbb78b2f19ee0c3b8cd00bc56d17cc22d68ff8f1039bc954ad75f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised CMS upload directories, suggesting it's part of a link farm designed to distribute malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d790216bcd5---12513480816.pdf In PDF document text
    • http://frezerovka.by/images/fxeditor/file/6560541441.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/193af48aa5b2874550942c8d36d5cf04/78946715839.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/9485269072fb0acf004f3680fa460ebe/85668772615.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f4d44b0cc9---69659308199.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd38be2c55e---76790203857.pdfIn PDF document text
    • http://feuerwehr-mittenwalde.de/mediathek/files/likagodemedaxodifupevaze.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7c73db5f1---58820407736.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/9a93346682fd6264c71838e6d435c0ee/86812592445.pdfIn PDF document text
    • http://evohome.pl/userfiles/file/lonuvujogatizitu.pdfIn PDF document text
    • http://toonesk.com/upload/xanoxomipik.pdfIn PDF document text
    • http://4darchitecture.org/img/all/32497359956.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ef8616f64---85973093612.pdfIn PDF document text
    • http://vietxetai.com/wp-content/plugins/super-forms/uploads/php/files/vjm8h024sc7pc0dr37hcaiaecr/93386222155.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b0e9b9f1b5---54548963247.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/xosufakowivetonu.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160e6344ea0732---18530300469.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/0dc506d0d1ff0faf68413978f49363b9/36882283077.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/nujipemisev.pdfIn PDF document text
    • http://amandamaitland.com/images/file/pavowikivurowuri.pdfIn PDF document text
    • http://prosquash.by/data/muzadokazajomavu.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/162g64t02u8g0kl9o571i72914/94639405648.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=frases+bonitas+para+desear+feliz+navidad+a+mi+noviaPDF 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_off00010971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10971 18024 bytes
SHA-256: 5f3a6f79d855f57f89c0ed532e897573a6c1de28717f2fa834e5eb215dc1bf4b
font_01_sfnt_off00013735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13735 10900 bytes
SHA-256: acbf0aca1ed925a6448d8bf49d0a8a68c2bac2b1e1b2c3f1c511b5cfadae5eae
font_02_sfnt_off00015040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15040 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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