Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea3f6eceb8a3321c…

MALICIOUS

PDF

90.5 KB Created: 2021-09-15 11:32:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 45275b454a446de0d3bd5c6d84d03335 SHA-1: 6c04fb8f301a64e1ec43ac9fee6d7e2e496ffce8 SHA-256: ea3f6eceb8a3321c0fb37c0d02ceb35a465e5872e02eb15e648e308f60427f9f
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that point to compromised websites, many of which host other PDF files. This behavior is indicative of a link farm designed to distribute malicious content or facilitate phishing attacks. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://antansconstructions.com/ckfinder/userfiles/files/letimofiwizup.pdf In PDF document text
    • http://erainbowrealty.com/userfiles/file/bagidikubovogawedago.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/13171672048.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/5443761814.pdfIn PDF document text
    • https://seikai.jp/free_images/files/88989489130.pdfIn PDF document text
    • https://bangvetthuong.com/luutru/files/puxetasexokagijemuratodum.pdfIn PDF document text
    • https://giyimkent.formenemlak.com/upload/ckfinder/files/5248335477.pdfIn PDF document text
    • http://mfahk.com/upload/files/83236065955.pdfIn PDF document text
    • http://kmsenior.org/file/files/45994765231.pdfIn PDF document text
    • https://pakianco.ir/data/image/uploads/news/files/rozazobepimaw.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1613aed41b280c---baxomexasud.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/c75aef342862661e8fcdd0a005ada21b/23378801885.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/80e567fd5ad9fafa66125b58fca3d7c7/nemabujewitovefajevolafid.pdfIn PDF document text
    • http://termosystem.pl/userfiles/file/jugigabi.pdfIn PDF document text
    • https://castilloexterior.net/ckfinder/userfiles/files/gosabawobuludezogelo.pdfIn PDF document text
    • https://harmony-lazienka.pl/Upload/file/20247822944.pdfIn PDF document text
    • http://ryukatsu.com/userData/board/file/kusojawitulejave.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/vegejutozitirikal.pdfIn PDF document text
    • http://ventss.ru/userfiles/files/dutex.pdfIn PDF document text
    • http://joyearland.com/ckfinder/userfiles/files/davuzomegenuxirotofinik.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/ji1tbdaq457pq33csldk1j9gv7/zebuja.pdfIn PDF document text
    • https://creativitagh.com/pevron/www/img/file/muwewavadivajekepukire.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613aa21d27932---felejovizo.pdfIn PDF document text
    • http://aygroupmuh.com/image/files/vefajesogobenekulerulik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=praising+words+starting+with+nPDF 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_off0000f3ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010c11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C11 21784 bytes
SHA-256: e93ec5a0c2ab300f8906f71ce26cc21055de4db3308cc92fad7e0102008c6860
font_02_sfnt_off00014565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14565 10436 bytes
SHA-256: 63d7a98770b9e781a2bbee4656e1f66a577189bdeafc9ae72f1b8fa9d71aa14e

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