Malicious PDF — malware analysis report

Static analysis result for SHA-256 52a024416fefd86d…

MALICIOUS

PDF

88.3 KB Created: 2021-07-02 06:13:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2797cc201b52b0f5d04fcaa4c44e9f1b SHA-1: 1dbe147210610803c72becdcce2c36fdb73cf02a SHA-256: 52a024416fefd86d01aa48862d6ecad32cea2a7e7ff97f7c2befd3f564786afb
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088acbd2f91c---78424192781.pdf In PDF document text
    • https://arerp.kr/data/file///mekojisiw.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/gewefukexuforobitukanon.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1a5d15379---tejasagaloporusapi.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160affcf9004c9---pebejajesisamuvek.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/dcf2743978bf2432a2919d74db73ea1e/67024939633.pdfIn PDF document text
    • https://seerupit.dk/assens/file/lenivumufakis.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1607d73325589d---zopulomenazol.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/ithf42qlaeqka7l3ggcq1us72d/85682056989.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/8609b7cbc064f514103deaf4ce5e601c/xoziwuxenurolapuwikiv.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab63c028445---1016949488.pdfIn PDF document text
    • https://broodjedenbosch.nl/ckfinder/userfiles/files/wawakutagakeleroguwijof.pdfIn PDF document text
    • https://aicpwdosaeast.com/ckfinder/userfiles/files/49757749351.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1f3c842e56---39702381232.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/wusemimidagewuxumiza.pdfIn PDF document text
    • http://bassbasement.org/userfiles/file/37347725261.pdfIn PDF document text
    • https://raptiherbal.com/ckfinder/userfiles/files/78254737167.pdfIn PDF document text
    • https://music-group-store.com/upload/files/liviku.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/c1951eb569bef46d901b3c6898eff34c/mozebu.pdfIn PDF document text
    • http://omak1968.com/clients/71178/File/19685539444.pdfIn PDF document text
    • https://travelworld.ro/userfiles/file/kefolepuposububusazexo.pdfIn PDF document text
    • https://raiporjai.com/piceditor/file/4835515702.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/mapobawanitunowepabaw.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/nugugudevoxararetazew.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/49588879640.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=holding+me+while+you+waitPDF 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_off0000f5ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CE 10716 bytes
SHA-256: bc6f19aa243f486ebad939fdccc815d7b9fbdafcc63684f95204d306d2b6dbd9
font_01_sfnt_off00010df2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF2 17728 bytes
SHA-256: b6a36cc7e27948890d7e887d4b28546d1a079bb1343024e3af37f0954dfc7feb
font_02_sfnt_off00013bac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BAC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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