Malicious PDF — malware analysis report

Static analysis result for SHA-256 04de98cc63bd0829…

MALICIOUS

PDF

72.2 KB Created: 2021-10-02 11:07:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: f6f8160c9119fbb7d42ffb5348dcde42 SHA-1: 3fed515eebaef92e65c27a0ff4c3c613eccd75a2 SHA-256: 04de98cc63bd08294385b4e1c612eee553b04043cb7867cee0b510a84d14c19e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS uploads, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9915

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://pistant.ru/uplcv?utm_term=carbonated+water+bad+for+you PDF link annotation
    • http://memsports.com.br/admin/libs/ckeditor/ckfinder/files/99246400096.pdfIn PDF document text
    • http://www.vandiestbrandstoffen.be/uploads/files/xusezoso.pdfIn PDF document text
    • http://unseretochter.com/images/file/11851460209.pdfIn PDF document text
    • http://islenapuntos.com/campannas/file/jekomomoj.pdfIn PDF document text
    • http://emekyesiltepe.net/images_upload/files/botalufaralesejilowixem.pdfIn PDF document text
    • http://aorganboys.handyfriendship.com/upload/files/potijofuzovun.pdfIn PDF document text
    • https://tranduongauto.com/app/webroot/files/images/pages/files/73904262012.pdfIn PDF document text
    • http://atmaircenter.com/lb/userfiles/files/ralizekugeberikerikor.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130922d2cd24---1082620240.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/4327fa2562cf5a72c477285fee1b4c12/nopowi.pdfIn PDF document text
    • https://associazionemusicaviva.it/uploads/file/96037425991.pdfIn PDF document text
    • http://3234.us/data/attachment/file/tepeguvusanosun.pdfIn PDF document text
    • http://kondicionery-lobnya.ru/upload_picture/file/63246000321.pdfIn PDF document text
    • http://vektorma.ru/uploads/assets/file/pibofitovum.pdfIn PDF document text
    • http://maurovalleferroarchitetto.eu/userfiles/files/81065104686.pdfIn PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/gelexamalafetig.pdfIn PDF document text
    • http://heryeryesil.com/resimlerfiles/nokuderenusomuluze.pdfIn PDF document text
    • https://ketdoanbus.com/webroot/img/files/dubepitaruwovokalifura.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/82702188403.pdfIn PDF document text
    • https://xylemleads.com/userfiles/file/30805453027.pdfIn PDF document text
    • http://cocoon-source-harmonie.fr/public/file/12146287230.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/161544e59ebe2e---83235107319.pdfIn PDF document text
    • http://ain.proximeo.com/ckfinder/userfiles/files/68820404465.pdfIn PDF document text
    • http://fongyoskert.hu/userfiles/files/wozelexowamexebiboxiwevef.pdfIn PDF document text
    • http://kvbm.org/pds/userfiles/files/43377543263.pdfIn PDF document text
    • http://synergytaekwondo.com/click2buy_newp/userfiles/file/54293526415.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_off0000b7a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7A3 17028 bytes
SHA-256: 678c207fb801336cc55bd49756cf3a317501bb8d0f1a7e786b1200a8939b8c27
font_01_sfnt_off0000e29d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB4 10512 bytes
SHA-256: 2546d39d1330a061e01a20ec8efb1447d51f070dc908d17ad196562df7a2e3ca