Malicious PDF — malware analysis report

Static analysis result for SHA-256 d29921b18f7f3596…

MALICIOUS

PDF

82.4 KB Created: 2021-09-05 01:51:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 190eb0674168c00ca849571e14d2a757 SHA-1: 5b7083143ef6999828712d2bd762ed35ad85e21d SHA-256: d29921b18f7f35963540388e1349f5a6297a85437e178c8c7621f118abda9e8e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF structure and embedded links indicate an attempt to lure users to external sites, likely for phishing or scam purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://laborke.ru/uplcv?utm_term=craftsman+professional+60+gallon+air+compressor+manual PDF link annotation
    • http://valeneighbors.com/userimages/54747421366.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/giwudurokigolarajipow.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16081299671f03---48728457968.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b221aa73483---62538076026.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab4b4b85a8---74709002522.pdfIn PDF document text
    • https://marigabung.com/contents//files/jokudirogijorob.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/r3hi9a7acif4hb251bkbppaf90/90704684898.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/60823884600.pdfIn PDF document text
    • https://skyzoan.com/cake/beta/userfiles/file/47102123889.pdfIn PDF document text
    • http://shinhwajudan.com/userData/board/file/zeduvamugur.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161325b9cbffe3---kukoveweba.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/ligizobu.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/d661a173bfba82ddfe84758fe4c72023/gewononexesizarokon.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f75a90f254---56870813308.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/95e6104ka3ep36htet1lvkdpf2/61668641933.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/53418663114.pdfIn PDF document text
    • http://ceramicaartisticamarsalese.it/userfiles/files/tagoxi.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/8e3aac941e9f190ddfaec101f9349cd8/vasusefavojudasokebudaso.pdfIn PDF document text
    • http://qca.ch/userfiles/file/fejexoniwelo.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/d2e97237645bce66d632a18ee214935e/22994163148.pdfIn PDF document text
    • https://europartner2.pl/uploads/fugom.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa68a16546---masajekogaginate.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE02 11244 bytes
SHA-256: 13c813a0df3ca4e729539f5cd6ba1ca516dda251520296a86a1892359f62d3ec
font_01_sfnt_off0000f862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF862 16912 bytes
SHA-256: d094a9e20488c5a6c3fb0167c163fb92f6f09107bd1c288bbaeb2a8776da9070
font_02_sfnt_off000123f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1