Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d1969e760681ea8…

MALICIOUS

PDF

85.6 KB Created: 2021-07-08 14:16:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 714d042649b7ea44871fe34a863c5da7 SHA-1: 95530c3cb8c0870d2b8a4b60789f632a5766499d SHA-256: 7d1969e760681ea8512965d3ca42637e24aaa45861a88b3765a6cf490d5068f9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS uploads. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ludifrance.fr/userfiles/file/dodipipezumijozemibome.pdf In PDF document text
    • http://rund.cz/UserFiles/File/75800727119.pdfIn PDF document text
    • http://fedime.org/imagenes/birew.pdfIn PDF document text
    • http://tbm-mova.by/images_from_html_editor/file/98488430823.pdfIn PDF document text
    • http://cambridgekapurthala.com/damana/userfiles/file/belesov.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/ripalukaruduz.pdfIn PDF document text
    • http://theettiares.com/clients/f/f0/f03dfc1790708d0b03c48e9879ef2ea6/File/vadobutufivizanit.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a382beb65---93952804872.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/42168767155.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/202164328586512.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/eb353e859782e441beeb01f953f860f2/biwatuxozu.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/5f08761c0ee922d1e28f75ccc68641e6/resiwevapegixaxeb.pdfIn PDF document text
    • http://lso-msm.fr/userfiles/file/vujefogotimanesezijikezo.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/a9c4a43b0b82fc3bb39f17c84f8c1b45/91563416270.pdfIn PDF document text
    • http://frezerovka.by/images/fxeditor/file/vidonokeleberuwanen.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/78904258908.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/e60270bd002116dd80603f62e8366f31/61904646078.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/59833855162.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/3fd4164f5b70eec984c7dde663aaf07a/41058326650.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/75262890989.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/16089942d99a44---30165747897.pdfIn PDF document text
    • http://luatsutiengtrung.com/app/webroot/uploads/files/kemoveratugevule.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0895f8c8b5---nifizikedukawufeni.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160de03213e65d---foxirekojovale.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/numizusutonewelas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=ghost+of+a+chancePDF 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
font_00_sfnt_off0000e2d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE5 1904 bytes
SHA-256: b8e959baacab10e437f7fe51fc09098d264dd2535c37a3997b0c02500e5c5a65
font_02_sfnt_off000103c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C5 17916 bytes
SHA-256: e2d2b79db46f3c5d5170cd2a0368cf91305850e536ff40436bcb9bb3ef09a293
font_03_sfnt_off000131c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131C7 10236 bytes
SHA-256: 0171e14b808996e43345509e93f77983567e788fcd593eb88a228e15b089834f

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