Malicious PDF — malware analysis report

Static analysis result for SHA-256 3edaf6b0dbf8233e…

MALICIOUS

PDF

82.2 KB Created: 2021-09-06 03:32:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 0c57bb16e403aa255a5a876739fb58cc SHA-1: a3f4cbeb51ebf6ebdd7cf8a339b0e72c33540f8b SHA-256: 3edaf6b0dbf8233e98f9f57e9efc401bcfc1c56c765dd901c21281f2b1f814c1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and an ML classifier flagged it with high confidence. Heuristics indicate the PDF contains a link farm pointing to compromised WordPress uploads and other disposable hosting, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://naturallabs.de/userfiles/file/48803085455.pdf In PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/cb333090e3bc8fffaf3a0259680b07a4/fugilotiw.pdfIn PDF document text
    • http://yummyschool.com/_UploadFile/Images/file/jenuxofirojemekebel.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160c84d249bba3---fosujaluzolorapomogaf.pdfIn PDF document text
    • http://uk-finansist.ru/userfiles/file/tatodepalebesisuv.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/puja8k4u0njn0j4hkn7vnapcsv/wunoridixemufupa.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/11ac9f589a322ee475a13090b3dc8e8a/nalifedojugogofuru.pdfIn PDF document text
    • http://pttaccounting.com/userfiles/files/22572862765.pdfIn PDF document text
    • http://engineersclasses4competition.com/files/others/43872305628.pdfIn PDF document text
    • https://codecs.roimages/file/bopomutafaxeku.pdfIn PDF document text
    • http://ya-ke.cn/admin/upload/76134144002.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607543fbc67e9---xolisejot.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/624933660482c1ad2eaa8775f92eb3d2/relaketusomekinadajupafo.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/dewujutukalodubar.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1608627a388cba---jefesosewegajalonivo.pdfIn PDF document text
    • http://austral-immo.com/userfiles/files/45991307200.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be279a0ab01---16256308207.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c68cb878b4f---11912091642.pdfIn PDF document text
    • https://tatsolarlight.com/uploads/files/pufonajivusajerafo.pdfIn PDF document text
    • http://dlikefulproductions.com/clients/875850/File/rigekadodazuwilexopadafu.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/8ff45a89f84e5039b9f9650f00df11e1/21398046663.pdfIn PDF document text
    • http://turhantur.com/turhantur/files/gozujesujozazutif.pdfIn PDF document text
    • http://hutergroup.de/userfiles/file/zobusimiwotukubesifodet.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=convert+pdf+to+machine+readable+format+onlinePDF 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_off0000db3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB3D 10952 bytes
SHA-256: 29eb6000abd4c75c49c640cd1750ec05a2e7dc75cfe604934cd7817f8717f9e7
font_01_sfnt_off0000f433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF433 17820 bytes
SHA-256: 4d76c7521b7cf0982bce8d44d269ce04ced7c689f7f3f5854000cc3fd2af3d8c
font_02_sfnt_off00012258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12258 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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