Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fd43b30f89bebf4…

MALICIOUS

PDF

96.0 KB Created: 2021-09-05 13:02:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9f386422f92c9edcb1b8957073ff7c27 SHA-1: a7318299a03ec398e36ef5b2315beb64d7462db2 SHA-256: 2fd43b30f89bebf403dc8d4dcc75ade7ca5e34346dee5118646a938d65464464
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 websites that appear to be compromised CMS uploads or hosted on disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

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 http://prunay-en-yvelines.fr/ckfinder/userfiles/files/favopudonabadol.pdf In PDF document text
    • http://coquicart.com/ckeditor/ckfinder/core/connector/php/uploads/files/jikijalupemavofozutawij.pdfIn PDF document text
    • https://motoralbini.it/files/file/zitizoxisiv.pdfIn PDF document text
    • https://siahotel.com/userfiles/files/63032919281.pdfIn PDF document text
    • http://szwygs.com/upload/45196087859.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609981fc4fb41---60661729644.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160881f65d2a2b---luvugedosumuwokemuxibu.pdfIn PDF document text
    • http://menafundinfo.com/userfiles/file/kibewoxefenerurit.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16098973d8d95b---46661309938.pdfIn PDF document text
    • https://huanghecables.com/d/files/70931013979.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/vufimarijawi.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/31608ed0f5c238a31608889285a31562/83315173261.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/51211c3a473d714a1c79ab7792061cd0/65764586362.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/wusogovemiginivogobusoxi.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/161130862ef92b---68386419370.pdfIn PDF document text
    • http://birkhoffhi.com/userfiles/files/30945265628.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/254d41c1cc51dde608f3872889293472/40994878477.pdfIn PDF document text
    • http://tara77.com/clients/46590/File/4250705796.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/61tn9ohcudns5ficuvbo36fbvf/4989705396.pdfIn PDF document text
    • http://findplusltd.com/file/97092592255.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/kawolodumi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=a+lei+do+triunfo+napoleon+hill+pdf+downloadPDF 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_off00010e4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4A 20408 bytes
SHA-256: 6e03be8ad9c631f3d62c03a3eac3400af377b2e10df279e344e254c84f1c9d13
font_01_sfnt_off00014295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14295 10592 bytes
SHA-256: 76bdda452aa72e2906b83663877985da9c2d9c6d85db1c2c23d6516da51613cc
font_02_sfnt_off00015ab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AB5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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