Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f2d48ead8f93ba6…

MALICIOUS

PDF

95.6 KB Created: 2021-07-07 21:19:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f15d355133e2b27c0aa29d14d52a59ff SHA-1: ee6a43d193111cf8edfffa3b0290032d08e0ab4c SHA-256: 1f2d48ead8f93ba6beac1751437b72be93142ed6cd5c852a1c187de9afbabe79
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links pointing to compromised WordPress sites and other domains, suggesting it's part of a phishing or malware distribution campaign. The presence of external URIs and link farms indicates an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://medvor.ru/uplcv?utm_term=kitchen+nightmares+mike+and+nellie%27s PDF link annotation
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/rd1u91nshhe1q192ckd8ga2hd7/gafixosovemovitijine.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/vavoferoluzo.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/dafcfbec9bcd9dd5ad02cf6d24fee3ca/jozokigobomabozuku.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/pozepizoja.pdfIn PDF document text
    • https://mecaniquekd.ca/upload/file/17533642155.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/10743115370.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/9d59rb6lvl4utm40k4pt3e1pd6/21397919337.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/jigadubisega.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/43137857367.pdfIn PDF document text
    • http://allycatering.com/userfiles/wekudodalet.pdfIn PDF document text
    • https://silverwayshipping.com/userfiles/file/10867828250.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/7140667684.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a48a782b3f5---76809878927.pdfIn PDF document text
    • https://andana.us/files/files/zegowobuzasibisop.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/r7aadtp4sesdt0nj8rvq6om6t6/18452769956.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf323c924b9---xejup.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/90e89f61d6650944e3d79d3b766cac88/jexivipedexelixuxa.pdfIn PDF document text
    • http://galettedesrois.hu/userfiles/file/69545851249.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/bb69295ec5de1c093e3bf2f227741e30/15971898249.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16093c6441cdb9---33679640310.pdfIn PDF document text
    • http://partnercable.hu/files/duwib.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ee10bc91f---bimala.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a30ad8a42ef---67579297945.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/qm2fkmkbcc2ahngfvsqm07boek/92808717521.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_off000113e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E1 10816 bytes
SHA-256: 45cd0d08e68f66e298fa3efc04b52eff15bfff0eb57c1338f49307638cd0795a
font_01_sfnt_off00012c6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C6D 17120 bytes
SHA-256: 7198b54bda9fdd4e9378c979f1e0b9c8f3e89d655fb25e4e0c33d452c3f9bd07
font_02_sfnt_off0001590e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1590E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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