Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a5823c5f742b0b4…

MALICIOUS

PDF

95.4 KB Created: 2021-09-02 09:20:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 06105462a6dcd68a84a7d83899623d90 SHA-1: aa6fbdb29096883f7cad2444a70a49391a5ab707 SHA-256: 3a5823c5f742b0b4b4bb59776c947580a7b292d73352a7b258866c43c5630de8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress upload directories, suggesting a link farm designed to host malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://walkandsmile.com/userfiles/file/rutatukigatogukajufu.pdf In PDF document text
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/fowedudozejote.pdfIn PDF document text
    • https://reazfarah.com/ckfinder/userfiles/files/62074251685.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/ae5f19863b7e1d3fe52c320f9ecde3f1/98023410770.pdfIn PDF document text
    • http://profitoolinfo.ru/ckfinder/userfiles/files/30377709296.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c962894c78e---13518214434.pdfIn PDF document text
    • http://www.naturhalles.fr/fckeditor/userfiles/file/tafekemidafefaviwikijuxo.pdfIn PDF document text
    • http://clinicaveterinariailmarzocco.it/userfiles/files/15173759713.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca310df14f5---wunifaguna.pdfIn PDF document text
    • https://easy2ticket.com/upload/files/rugofamojirimixes.pdfIn PDF document text
    • https://zohopin.com/calisma2/files/uploads/pafule.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dac09e1e95a---lusutuzelubagisolo.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/31560419502.pdfIn PDF document text
    • http://www.pethouse.es/ckfinder/userfiles/files/nagod.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/4362e94c5c8a6548f0dbebbd0f8774e1/xatunep.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/bimomiluluzobupo.pdfIn PDF document text
    • https://sahodayabbsr.com/test/fckeditor/file/pobufobosugodow.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab1251e5f2---wabuvofepeki.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/fbc29b0d960d2cd537c7f5a68dd7b0c1/28084617384.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5e7a6a6df---66612056781.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021062502595446.pdfIn PDF document text
    • http://www.naturhalles.fr/fckeditor/userfiles/file/5358635684.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/81783853751.pdfIn PDF document text
    • https://ubranni.com/uploader/files/jexivemaruwul.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/uo7d5t6tg0i3qe41l1pi0u419b/gifawulifuse.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=can+you+use+himalayan+salt+for+cookingPDF 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_off00010e9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9F 11120 bytes
SHA-256: c287953f8db8f8444e5b66e5c480df2ff92b09dcca84297167f9361539d2cc95
font_01_sfnt_off00012878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12878 18044 bytes
SHA-256: 11b16e420d3816f1a1a1611847f3b8e5cb4ffa2ddc778b093fe0990ba168d877
font_02_sfnt_off000156e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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