Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcd4a864d6dd07e8…

MALICIOUS

PDF

83.9 KB Created: 2021-09-19 07:16:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2e0f155ffd0cf37cd28a4b9d79401082 SHA-1: 1b446d156f2630b999703fcae5342df18a3b5222 SHA-256: fcd4a864d6dd07e84373b125daa70915ea70e0b042e63535cf1a4113548a484a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV and an ML classifier, and contains embedded JavaScript. It also features numerous external URIs, including links to compromised CMS uploads and link farms on disposable hosting, suggesting an attempt to redirect users to malicious sites. The primary function appears to be directing users to external content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=conjuring+movie+full+movie PDF link annotation
    • http://storemisr.com/uploads/files/wafufe.pdfIn PDF document text
    • https://santa.my/images/users/00000000/files/gigivur.pdfIn PDF document text
    • https://florissantdesign.nl/docs/Image/file/31846173304.pdfIn PDF document text
    • http://urgentcarepb.net/userfiles/file/xirok.pdfIn PDF document text
    • http://aylabawadi.ae/userfiles/file/rupunad.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614665755c297---14558664779.pdfIn PDF document text
    • http://protok.pro/upload/files/zasokavesi.pdfIn PDF document text
    • http://salman-group.com/userfiles/file/41086934390.pdfIn PDF document text
    • https://albizy.com/ckfinder/userfiles/files/besipifamalumez.pdfIn PDF document text
    • https://tndvn.com/js/ckfinder/userfiles/files/zipatisixowifaxenuze.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1613a4b2438855---daxoxovozonajifatugapego.pdfIn PDF document text
    • https://drbumbnursinghome.in/ckfinder/userfiles/files/78671640595.pdfIn PDF document text
    • https://magnumattachments.com/ckfinder/userfiles/Files/jopomatosanufezirase.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/e0d9bbc37cc04b84f2277c51761bface/pokatajituxodarutawode.pdfIn PDF document text
    • https://kalashad.com/userfiles/file/pijexom.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef08d3a76f---49847898680.pdfIn PDF document text
    • https://mcdelandes.ca/uploads/file/jidepes.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/39571948733.pdfIn PDF document text
    • http://chelseafoodmart.com/uploads/files/34188212086.pdfIn PDF document text
    • http://mail-business.ru/uploads/file/madino.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/e6c983d0be42dec14e1340ca4823018c/werelemuvixeko.pdfIn PDF document text
    • http://rowerowaszkola.pl/imgturysta/files/dogafowajalugatubuwov.pdfIn PDF document text
    • https://eownauto.com/uploadpic/files/70290332889.pdfIn PDF document text
    • https://orig-shop-gsm.ro/ckfinder/userfiles/files/motegoviporu.pdfIn PDF document text
    • http://live-lessons.net/lcj/web/uploads/assets/file/15477692455.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_off0000e2ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FF 18140 bytes
SHA-256: ba0c2c8dc84d8a78d613ccaf98589b7bba260695ed2e3e2ef40d7f1895545975
font_01_sfnt_off000111ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111ED 10456 bytes
SHA-256: ac40612cde180646792e62b72211aa922ba48fc17c8880e3d9f73f4ded733daa
font_02_sfnt_off0001299c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1299C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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