Malicious PDF — malware analysis report

Static analysis result for SHA-256 40e5d6f825b74395…

MALICIOUS

PDF

83.3 KB Created: 2021-09-05 22:20:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 472d2bf219aa733f1ec9a86f08943f34 SHA-1: 324182edb4d761e17816ad7b02e9d8bd3e24f726 SHA-256: 40e5d6f825b74395e720b2e6ae2e3b0ac6fd86b3cf763c87c8b825dd3116c80c
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://namlongadc.vn/uploads/news/files/20968687258.pdf In PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/pruopb7rf8cr95c9ctamv9muon/70474344969.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/b9ture2g2sgmabj7be8c44kj7ivva12l/kovidifogenoxaxipofag.pdfIn PDF document text
    • http://muszempilla.com/files/file/40018855340.pdfIn PDF document text
    • http://asvpp.fr/pdf/33203468180.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe5433ab7a4---korusapadujuvadu.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9cf098e8a3---muxabifegimasida.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/21911725880.pdfIn PDF document text
    • http://alphaconsultinggroup.us/vpw/images/file/movuri.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160df8cbed0dc5---92152166852.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160afdd139803e---daxavebevibajudadulupumuw.pdfIn PDF document text
    • https://panegovernance.com/ourprojects/chowki/UserFiles/file/venetitaka.pdfIn PDF document text
    • http://lambanghieuquangcaogiare.net/vietkiendo/upload/file/wetesiwezakajoxebal.pdfIn PDF document text
    • http://gabident.pl/local/userfiles/file/rowafaxi.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/ce59253a784afd005ec60021284463b6/fawuwugugajujepeboze.pdfIn PDF document text
    • http://93564497.com/userfiles/kuzejorisijazuwexipi.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/mewuritopiposowox.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b2f6ef066de---zisifesuxomuxamijes.pdfIn PDF document text
    • http://izeninfo.net/admin/upload/files/61005459114.pdfIn PDF document text
    • http://ccforum.kr/uploads/file/1630803515.pdfIn PDF document text
    • https://fortworthdental.net/cmsCart/upload/file/ripevuvogifi.pdfIn PDF document text
    • http://familiegravesen.dk/userfiles/file/32387694201.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=solving+equation+with+two+variables+worksheetPDF 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_off0000de68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE68 11092 bytes
SHA-256: 9900fd9de3a912b264485cdca3f658c44d7a1a36818b2efd33b5d923fb044268
font_01_sfnt_off0000f7fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001100e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1100E 18180 bytes
SHA-256: 7422c4e15196e463053e9e8b4f31a95277251471ff83bcb9add63fae33327eee

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