Malicious PDF — malware analysis report

Static analysis result for SHA-256 a96c3380ea71dcce…

MALICIOUS

PDF

97.2 KB Created: 2021-07-02 05:01:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: aec11f4b52af7363e89242399ca80511 SHA-1: 484ee675acbb728fcd875925a7d5db5477550a44 SHA-256: a96c3380ea71dcce18a6495a920b6f659afaccaffc1d2ee401b4136d422a1cb1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a large number of embedded URLs, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the embedded links and the PDF format itself can facilitate malicious actions, potentially including the execution of embedded JavaScript if present, which is a common technique for phishing and malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://nomylo.ru/uplcv?utm_term=luca+trapanese+book PDF link annotation
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608754630013e---4944938289.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9e877a4319---tegenobokigebup.pdfIn PDF document text
    • http://aj-freight.com/ckfinder/userfiles/files/tevulawodal.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9e1ae5287---37075301147.pdfIn PDF document text
    • http://konyaozgunmobilya.com/userfiles/file/fatisevaxosupuduzaso.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/be683af747dee978016d96043b3e660a/66501115396.pdfIn PDF document text
    • http://rymwid-training.com/userfiles/file/97328743500.pdfIn PDF document text
    • https://shen-su.eu/gfx/userfiles/files/demotifadalisara.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/c9f923ae50fa92b91baf6ddbe098112d/36766248335.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afad5084e6b---rabevowijezomiwe.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/lulusafiwopebilim.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210502124231.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/c743f55f03692d262c56ba45bb6a76e5/93540534975.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/b7440867bc33749423321d2f1c01e44c/jomugivoxuwimoz.pdfIn PDF document text
    • http://guitarenko.fr/img/files/94025137260.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/24055584622.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160735f7c254de---tekalasudukapisaja.pdfIn PDF document text
    • http://www.asslar.de/downloads/47290499838.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCA 18444 bytes
SHA-256: 98887d50fe43bb2932d07301f339b2bb828ccaab677143470e7309b2a236654d
font_01_sfnt_off0001307f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1307F 16164 bytes
SHA-256: fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467
font_02_sfnt_off000145f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145F6 10516 bytes
SHA-256: 3363d59bfc0fc49c4d9cfa567550f56edb987cf3ffc751022015fc240a67afeb
font_03_sfnt_off00015de1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DE1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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