Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3ee6fe5d885747c…

MALICIOUS

PDF

216.9 KB Created: 2021-09-02 22:34:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 50e8fc1425ded25e72162c517aaa49e7 SHA-1: 4527e0b3c0e0eafa51c77abe981a75f8b0170025 SHA-256: f3ee6fe5d885747c6d0a69cbbd030649e700ecefec4530da2f14eb0b00d4bc74
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to compromised websites or content management system upload directories, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing lure, likely attempting to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9448

Heuristics 5

  • 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.
  • 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://maturana.cl/upload/file/39177593397.pdf In PDF document text
    • http://kojeneckezbozi.eu/userfiles/file/53758168495.pdfIn PDF document text
    • https://champion-osk.pl/userfiles/file/kutakuxe.pdfIn PDF document text
    • http://kennycojewelry.com/userfiles/files/202108/1629713469.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/d435d45f6a29bfd33c923c6f661c4ff2/57578308527.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8cd1e9e6b---solidinosev.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/elqpuahiccjuqe8ul477th8563/defojodovug.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/77b4c370baa153091c0b44c1308326dd/94561593397.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ebc67b378---11851016937.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f7fcf880b99---bixudagabiz.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/a601f603adce64581c75a267e916e3b7/sejenoxapezoba.pdfIn PDF document text
    • http://clear-es.net/yamituki-n/uploads/files/70423518539.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/wonirexapukuru.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/7a2pe0fjctmkcl6nvp30mfipv4/63055897309.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/kodjodr4gn6uquh99l0okcl9gp/93289282327.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acbe891e4fa---xubumunoloxamavadatexan.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160f300de92de0---pokufivewosoradakofubel.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/vipodakujatinumowiwipolo.pdfIn PDF document text
    • http://quetthe.com/upload/files/97892388597.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac33e7003e8---dunavofupijidujarezozi.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/47b5ebd90bf7e99631dc6727ccaf56e0/62469553915.pdfIn PDF document text
    • http://rdmsrl.it/userfiles/files/batinomeraputuse.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/d2a6b1f0e8559972459a68ec024b64fe/tuvojimirijarodipubi.pdfIn PDF document text
    • http://phuongdonggolf.vn/app/webroot/uploads/files/sujegudazirajafunekiwo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=kumpulan+kosakata+bahasa+arab+dan+artinya+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0002d93a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2D93A 34540 bytes
SHA-256: 6676ef530412d018e1351ac7d00ea138ceb2829ad0fefcab7d9414997527a732
font_00_sfnt_off0002bfe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BFE9 11068 bytes
SHA-256: b4c0376335614777ad9e88912af09cfdfb402a3f1e10a7e0faa0566c0475172a
font_02_sfnt_off0003150b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3150B 15624 bytes
SHA-256: ec811955c07ebb5d7a351496edb1e424114579b4e0ef7f0f9d25680ba56339dc
font_03_sfnt_off00033cdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33CDC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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