Malicious PDF — malware analysis report

Static analysis result for SHA-256 f06f0745b178ae02…

MALICIOUS

PDF

113.7 KB Created: 2021-10-11 09:28:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 292d19789c867a4d2cdd15f5217fc364 SHA-1: 9db8e7bf0579d670d4b4bf7632fc299cff37fbe2 SHA-256: f06f0745b178ae02bcc84f2cec956e63719e41892a5eb144eb3990c295e615fc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites, likely involving JavaScript for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9873

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://pistant.ru/uplcv?utm_term=trick+or+trunk+2020+near+me PDF link annotation
    • https://ceccarmehedinti.ro/userfiles/file/1381915168.pdfIn PDF document text
    • https://altstudio.be/app/webroot/uploads/file/69497116538.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/18071263075.pdfIn PDF document text
    • http://kultura-vyazniki.ru/sites/default/files/file/gawemolop.pdfIn PDF document text
    • https://yarpaket.ru/userfiles/file/5944689829.pdfIn PDF document text
    • http://gabinetpro.gabinetpro.pl/kosmetyczka/krakow/files/nonakasolebize.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/92534cd3776b229f1e7289a94dfe4e07/tofadebudoliwifilokaj.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/06uc0mffdiqe666um174l517bg/fututa.pdfIn PDF document text
    • https://luiginoiobbi.com/userfiles/file/vuvadetuled.pdfIn PDF document text
    • http://pachinkoevent.com/sites/default/files/file/24306810149.pdfIn PDF document text
    • http://haohanlegend.com/Uploadfiles/files/28841135894.pdfIn PDF document text
    • http://maymaygiaydachidang.com/upload/files/17717587625.pdfIn PDF document text
    • http://hmed.vn/upload/files/wanasodabitimazaxigeziz.pdfIn PDF document text
    • https://kibledergisi.net/resimler/files/69469158025.pdfIn PDF document text
    • http://artpolinakuzina.ru/pict/file/35219901078.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/16159ad6ae78b1---ropijexalolegewamiguj.pdfIn PDF document text
    • http://citty.org/images/uploads/file/83220206117.pdfIn PDF document text
    • http://czerwoneiczarne.pl/files/file/34779923033.pdfIn PDF document text
    • http://jeanthompson.nl/ckfinder/userfiles/files/zigalojorosixevuzepet.pdfIn PDF document text
    • http://chi-kara.net/Upload/files/sizizo.pdfIn PDF document text
    • http://thailaundry.com/imgUpload/files/72333512830.pdfIn PDF document text
    • http://studiotrusso.it/userfiles/files/nowosepanu.pdfIn PDF document text
    • http://tomasmrazek.cz/userfiles/file/labofixiranalerixajadifos.pdfIn PDF document text
    • http://jca-t.com/fck_image/file/47604392904.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613be755ae3c9---32307109611.pdfIn PDF document text
    • https://sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16156e32e5b96d---vanevibiv.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_off00014e28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E28 22064 bytes
SHA-256: fa1395d61f5957a3f447d8edb410c80ea019d2e21bc32d6d125f39d6de9f5a71
font_01_sfnt_off00018714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18714 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00019f2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19F2B 10576 bytes
SHA-256: 4636deb489bbd2a0e5ec2a32223055e5aaaf0a6aa250f5bd7a409f798b144512