Malicious PDF — malware analysis report

Static analysis result for SHA-256 25e18cfdab5f9f7a…

MALICIOUS

PDF

85.7 KB Created: 2021-08-28 22:28:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: aca8431b761a28ae59b6df591a5034ec SHA-1: 836b5c96a817dad6c7f10141f3c9475a0655edd8 SHA-256: 25e18cfdab5f9f7a28cbe64dc0a2d9acc2b1a9c547e27ccff246c9616332189b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites used for hosting PDF files. This suggests the PDF is designed to lure users to these sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d89c5451223---raximezomejovadanap.pdf In PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/bc925fab8f951823268e37e290ebe0ec/6928805064.pdfIn PDF document text
    • https://beta.nhatthiengroup.com/files/uploaded/files/64999354349.pdfIn PDF document text
    • https://oddluzanie.net/userfiles/file/64584001791.pdfIn PDF document text
    • http://cosmoscm.com/contents//files/65246233874.pdfIn PDF document text
    • http://brilliantsolarpaneling.com/userfiles/file/dupekikuk.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/2jjoo3nopt1dvt84fmqacgsi13/57014303027.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd3d65431c6---57887492062.pdfIn PDF document text
    • http://yogo110.com/userfiles/file/kumopifuzoleto.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/geq9hgqethf444tnpbv8tem5v6/75784109420.pdfIn PDF document text
    • http://pcserviszlin.cz/ckfinder/userfiles/files/93342920195.pdfIn PDF document text
    • http://restauraceeverest.cz/userfiles/file/10141471642.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/8cck8p32caregc39s3ij65ma2s/xumememuduxesi.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/1ll4no98jalmihseqldo52jhvc/mitasuruzukuwidutukifu.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/66b8352c7bc962f3abb9b0f63282933a/sisobo.pdfIn PDF document text
    • http://www.asslar.de/downloads/lenetorusew.pdfIn PDF document text
    • http://psychoterapia-przemysl.net/img/userfiles/file/lopalobuzeku.pdfIn PDF document text
    • http://ticaproduce.com/ckfinder/userfiles/files/xixesososebilora.pdfIn PDF document text
    • http://studiopassarotti.it/userfiles/files/zakitoz.pdfIn PDF document text
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/aucrufukgbe46h9756nl8f0mln/62787975717.pdfIn PDF document text
    • https://iasvn.org/Images_upload/files/60608501682.pdfIn PDF document text
    • http://www.jasfec.com/imgs/uploads/31969911766.pdfIn PDF document text
    • http://linuxnewyork.com/draft/media//52139183556.pdfIn PDF document text
    • http://hanilkwanla.com/uploads/files/73848117512.pdfIn PDF document text
    • http://pitin-akutsu.com/js/upload/files/ribimigezesogowed.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/16074164285d48---16918199988.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+summon+crystal+wing+synchro+dragonPDF 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_off0000e478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE478 10976 bytes
SHA-256: d714b50525c773ed441414de4d4b5ef5e45a0e075d950c940802dd52a8bd5c3a
font_01_sfnt_off0000fd95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD95 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000115a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A7 19536 bytes
SHA-256: 847066456afdf205e306dea39d2fcf4b1398c3a94c6474977105ac2e76c1ecee

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