Malicious PDF — malware analysis report

Static analysis result for SHA-256 568af04f692256b2…

MALICIOUS

PDF

84.2 KB Created: 2021-09-06 19:01:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 600822a460c97722a04f7fbe1cc7676e SHA-1: 98c5fb914492ed78318073cf07583f9b329e1263 SHA-256: 568af04f692256b2467c0f8e3f5966f29d29e22a1edb63a393a4f5e1f1ab6a3f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to domains associated with compromised CMS uploads or disposable hosting, indicating a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or SEO manipulation. No scripts were extracted, but the structure and URL analysis point to a malicious document 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://ndt-tl.ru/upload/file/tebobudixetemabavar.pdf In PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/700aiiu8bn02ku7pe8mleekfa5/33323858239.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/e7si612rflp31do2lsqlj6pec9/peromejujowuxekowulo.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0b01af463---46703663397.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/epebm7l1pheuf145jqk52sgcg7/folaremez.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/kozasejewuduxa.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4fc8cefa2---62267369653.pdfIn PDF document text
    • http://elskenecologie.nl/files/59376195584.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/3gn6t02u465t6m1m4s29hoc1d2/fajilamizunuzovur.pdfIn PDF document text
    • https://100tmt.com/uploadimage/files/20210819204346.pdfIn PDF document text
    • https://editionsitaliques.com/userfiles/file/damubo.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/8b949c8c4a3970b49723756097778ca2/xelejedisijidurokemamegij.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d87848c0a4---gilow.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/xabikilow.pdfIn PDF document text
    • http://bulongvungtau.com/media/ftp/file/nuwirajudufibalepajidag.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles/file/19855333035.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef7c46bb5e---satetadofupugubo.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/16079fd0e42c14---45879015536.pdfIn PDF document text
    • https://hashtag.school/userfiles/file/61009401620.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/vs1ce27flfidascb8tfhdsk1a8/73918128228.pdfIn PDF document text
    • http://ikoi-es.club/yamituki-n/uploads/files/tuzorizifakenujovabuvete.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b738d24d6---debiwer.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c97c0f8937d---33220814306.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=best+pdf+watermark+remover+softwarePDF 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_off0000e345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE345 10716 bytes
SHA-256: b58d485445b904f1a6a8d53213947344a9565d6cbd1ac173346246c2591141e8
font_01_sfnt_off0000fc12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11424 18232 bytes
SHA-256: d0533f2d300987af2a0551b94acca8413b75ca9967679996b4b12ce450640e55

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