Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a447f29bfc9954a…

MALICIOUS

PDF

72.4 KB Created: 2021-09-17 16:09:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 93fa6f7801bd7d9f0c32a8bda647aedc SHA-1: f909b02ed890c8552c9ef6e20ea924e508bdd12e SHA-256: 5a447f29bfc9954a43f0bb0f978abc1ef8a473d635e9335f734148f52e558d90
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites, likely intended to lure users into downloading further malicious content. The presence of multiple distinct hosts and the use of disposable hosting indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141667cecff4---sikasuxe.pdf In PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613f6b48b48fe---ripijamuveguwigo.pdfIn PDF document text
    • http://holland-ex.com/images/blog/file/61973907565.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/5312b7b09a31adbf5e74cd07ecc8d6cd/80850931317.pdfIn PDF document text
    • https://charteriraq.ir/basefile/charteriraqir/files/37324688581.pdfIn PDF document text
    • http://wignaccent.com/FCKeditor_2.6.3/userimages/file/20210906025112.pdfIn PDF document text
    • http://archiwum.wyryki.eu/admin/ckfinder/userfiles/files/52100835360.pdfIn PDF document text
    • http://delfosventures.eu/userfiles/files/71282650136.pdfIn PDF document text
    • https://pharmnet.cz/ckfiles/files/files/zuxevatadegojob.pdfIn PDF document text
    • http://pozitron-s.ru/userfiles/file/rajokota.pdfIn PDF document text
    • https://lee-trading.tw/archive/upload/files/71936884843.pdfIn PDF document text
    • https://nepalonetours.com/userfiles/files/77719212073.pdfIn PDF document text
    • http://koyomisushi.com/uploads/files/gabikazaziwe.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/c2ef789d13a655fd1f927fa9bafb5851/96120119271.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/fokudemisisuluzulim.pdfIn PDF document text
    • http://getrade.net/uploadfiles/file/vojugeselujabelekafi.pdfIn PDF document text
    • http://mobilahomedesign.com/userfiles/files/lojetamedojuvo.pdfIn PDF document text
    • https://mygrind.ie/userfiles/file/rekutotapegigun.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/userfiles/file/35896778639.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613394a27b858---48469393118.pdfIn PDF document text
    • https://renetravel.ro/images/files/jubagizejevakugiwumexoxe.pdfIn PDF document text
    • https://lompatjauh.com/contents/files/sefesuperorovuvosa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=american+truck+simulator+android+downloadPDF 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_off0000b7ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cfc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFC3 10792 bytes
SHA-256: 313743c36d37f0a7cd1de5c63dd398ad348ebb6edbbf1676d04e300b37f0b529
font_02_sfnt_off0000e8a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A9 16812 bytes
SHA-256: 5ddf9b8424cc5f845d626d33f435ac4d7132542081535bbe3d7ede35d06a1a60

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