Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f0a02ab70ae91d7…

MALICIOUS

PDF

80.2 KB Created: 2021-09-03 21:19:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 766c6984b82f0add43b11453982a9c0b SHA-1: a8389d596e6e1113afc7c201e2fd5a730fbf45de SHA-256: 6f0a02ab70ae91d7aee144fbc6bca9c4a7057c23e516c2ce28a967ff57dae14d
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It functions as a link farm, containing numerous embedded URLs that point to various websites. Several of these URLs are hosted on compromised CMS platforms, indicating a potential distribution point for phishing or further malware. The presence of multiple external URIs and the compromised CMS upload link heuristic strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://ketchas.ru/uplcv?utm_term=list+of+sobriquets+of+the+world+pdf PDF link annotation
    • http://architettoletiziamasciotta.eu/userfiles/files/vikolem.pdfIn PDF document text
    • http://acquadiqualita.it/ckfinder/userfiles/files/robigisufizavaxopopatogaj.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/b425ab0a6a952fec4e2436a514bb5b9a/tobopepusopedetesoxise.pdfIn PDF document text
    • http://kondicionery-lubertsy.ru/upload_picture/file/makanabalulevitisimuwemuw.pdfIn PDF document text
    • http://innovad-ltd.com/userfiles/file/88913282413.pdfIn PDF document text
    • https://deltagroup.bg/uploads/file/bepubatibifur.pdfIn PDF document text
    • http://bienbao.org/uploads/files/72544763787.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/d75b41c402cb3a43e860487691a56b14/lubelogiwosesejudikefi.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/96822712935.pdfIn PDF document text
    • http://luminex.pl/upload/file/wogumanime.pdfIn PDF document text
    • http://cariboohose.com/userfiles/file/36624125854.pdfIn PDF document text
    • https://pearproperties.in/userfiles/file/denemasa.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160d9cb8ab9b72---90411215601.pdfIn PDF document text
    • http://mutamobilya.com/images_upload/files/72790644820.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc86093cf0a---tajojepusivekaliresalenu.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/c3425e3f75df682cd861142e4fc61c31/4314771156.pdfIn PDF document text
    • https://hotelexpert.ro/uploads/files/16385598325.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/3ohcdi2734oipdvfa2t1ln4d77/belupadufuje.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec3fd6be8e8---41918285393.pdfIn PDF document text
    • https://atlantidegattico.it/file/gopox.pdfIn PDF document text
    • http://gulfcoastlist.com/userfiles/file/43304569910.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/zetuv.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/de430c38e56cdf471a79f8ce9af1e91c/88052818389.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_off0000d5fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FE 10760 bytes
SHA-256: 654950f7cc97eb15cfef1800e3e9c0dd7cedd7a7d1a2a302799d9f71b3eedf09
font_01_sfnt_off0000ee7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7E 17248 bytes
SHA-256: 87f86992a6a54a6d5e87cb6c4ead7e350455b8e329858c9a348597f88bc73809
font_02_sfnt_off00011b39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B39 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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