Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2e46494b33fba15…

MALICIOUS

PDF

70.8 KB Created: 2021-09-27 20:25:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1bb364654831dd08e7943864f5dc5d73 SHA-1: 14a9aeaf1254245f5064dae1c09efa67e369177c SHA-256: c2e46494b33fba15cdad66e6999769a9df888cb8ed311b6cdb92e869ab1b2397
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by multiple heuristics, including ML classification and ClamAV, as malicious and phishing-related. It contains numerous embedded URLs pointing to external PDF files, suggesting a link farm or redirection mechanism. The heuristic 'SE_QR_LURE' indicates the document likely instructs users to scan a QR code, a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://archism.ru/uplcv?utm_term=scan+qr+on+my+screen PDF link annotation
    • http://leadingedgecorporate.com/user_images/file/43794532881.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/11676411924.pdfIn PDF document text
    • http://futureinfashion.com/ckfinder/userfiles/files/23441492932.pdfIn PDF document text
    • http://numere-mopede.ro/mm/file/juluk.pdfIn PDF document text
    • http://manuale.aziendasulweb.it/userfiles/files/55605871657.pdfIn PDF document text
    • https://thebottombillion.org/business_school/uploads/file/pifolo.pdfIn PDF document text
    • http://qkmedica.com/uploads/userfiles/file/misegegosek.pdfIn PDF document text
    • https://specializzati.tecnaevolution.it/dataload/ckupload/33565287661.pdfIn PDF document text
    • http://88cpap.com/userfiles/files/kikuborus.pdfIn PDF document text
    • https://panoramabyty.cz/content/maminegaxasuxonib.pdfIn PDF document text
    • http://kfnmdg.com/upfolder/e/files/20210916110323.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613ba9ed0b268---jijewexamigajejipo.pdfIn PDF document text
    • https://dichvumoinoi.com/ckfinder/userfiles/files/zurolizokuwumebi.pdfIn PDF document text
    • http://suachuamaydemtien.biz/userfiles/file/20176873890.pdfIn PDF document text
    • http://boonfagrandhome.com/user_img/files/52397533459.pdfIn PDF document text
    • https://ags-car.60km.com/upload/files/48890965116.pdfIn PDF document text
    • https://xn--z4qq44i.xn--kpry57d/upload/actfiles/75814421454.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/c0tuvsdcpkgtqk1iehp1o329p6/kufezuxaregabegule.pdfIn PDF document text
    • http://zhuoxinlaw.com/userfiles/file/20210920020218_459057123.pdfIn PDF document text
    • http://kamennykoberec.eu/editor_uploads/system/files/gejefituno.pdfIn PDF document text
    • https://rowadalbyt.com/userfiles/files/77276175940.pdfIn PDF document text
    • http://spbi.cz/res/file/99808814680.pdfIn PDF document text
    • http://coral-travel66.ru/admin/ckfinder/userfiles/files/87429302517.pdfIn PDF document text
    • https://elsa-daulte.com/ckfinder/userfiles/files/73153088344.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_off0000b288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB288 16960 bytes
SHA-256: 5ab2b790cbb1a05f3b4d21e13d42bf9b83e871d74ee76970197da5d19f4fb39a
font_01_sfnt_off0000ddb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB3 10488 bytes
SHA-256: 918faed2fbb52baee63cbfe3329af8f6287b9a4cfd8b0023b107638b19ea7a9e
font_02_sfnt_off0000f594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF594 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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