Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eebe878f89ed099…

MALICIOUS

PDF

92.8 KB Created: 2021-07-04 01:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 7b2fec128b744acf11b8df3d192b99f1 SHA-1: e7d2d190251a7a3436a62c842f5c4a410736505a SHA-256: 0eebe878f89ed0998ba3ebfca302b5bd77898f6bd854134b4da6e6999fc2732d
156 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites. Heuristics indicate this is a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://crewmak.ru/uplcv?utm_term=psychological+anime+like+death+note PDF link annotation
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/ci3oakska6o12erem7ll12e465/mukus.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/fexufipagibapoxevugovolaf.pdfIn PDF document text
    • https://efnnma.org/files/file/tarawizufabiwunaramenuza.pdfIn PDF document text
    • http://edanieltour.com/FileData/ckfinder/files/20210531_800264E1CF7D3845.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c22837bb2d2---71038647939.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/b10e4739e91796efcafe757b89a18edd/xowopefatawule.pdfIn PDF document text
    • http://meandnetworking.com/ckfinder/userfiles/files/46022841037.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/56656915619.pdfIn PDF document text
    • http://koovappadyscb.com/ckfinder/userfiles/files/razil.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16085c9c004fa3---6909379438.pdfIn PDF document text
    • http://amandamaitland.com/images/file/70440357152.pdfIn PDF document text
    • http://kidneytracker.com/ckfinder/userfiles/files/32153387190.pdfIn PDF document text
    • http://headrepublic.pl/images/files/lilidazitumosat.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa21b78abe---fofilomajozij.pdfIn PDF document text
    • https://educhina.mn/editor/files/panotemokem.pdfIn PDF document text
    • https://steammining.com/userfiles/file/35663124123.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607c741867158---wividif.pdfIn PDF document text
    • https://indobaliart.com/sitefiles/file/gawarobuj.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/96505476791.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/gq0s8oj05sddi033rhqkmrvks7/sekonoror.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/d2b6ggup7q1re6bgkgi6noi4im/54920216824.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609478bb1fd03---nitofagor.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/d2f3b440563a7c1e6855a146a7a7704c/fokugagajatuz.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085037f313b3---jamopivurumobewirir.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_off0000f1fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FE 16660 bytes
SHA-256: 40f9c83b8d5d5a8a4ad8d2ba3323e7f5350ceaa77cd15b99f98b0581385f2c88
font_01_sfnt_off00011d4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D4F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13566 10924 bytes
SHA-256: 61d52c901fa765fbf1cb3853b7d85c14bfe03b8df22f875ae9f857df97e4ea6c
font_03_sfnt_off00014e56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E56 5776 bytes
SHA-256: a65666c590019827b81212f0504258a5c12f21aa25cb1f47ea0674f19b75622d

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