Malicious PDF — malware analysis report

Static analysis result for SHA-256 f62bbe99f766b3e8…

MALICIOUS

PDF

82.8 KB Created: 2021-09-01 17:51:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 736e023d717fed57b17f7c0d5fa07394 SHA-1: 50255ae6095a67c45ea79bf939b990f22952ef0b SHA-256: f62bbe99f766b3e899c5ca5742aa12b04a361e282c680f6700fcdf32ec4f4d40
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the embedded URLs and heuristic firings point to a link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://philabc.ru/uplcv?utm_term=what+lightsaber+color+do+you+have PDF link annotation
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca8c8a0cf6---lafujawesujoxujodime.pdfIn PDF document text
    • https://weboonline.com/ckfinder/userfiles/files/29080769639.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2607a67bd---85620333264.pdfIn PDF document text
    • http://choragwica.pl/userfiles/file/dijegigeme.pdfIn PDF document text
    • http://arenda-v-novosibirske.ru/ckfinder/userfiles/files/jugavize.pdfIn PDF document text
    • http://biaikatolikus.hu/files/file/zaxudenakajogerubowo.pdfIn PDF document text
    • http://muszempilla.com/files/file/gosozanuvatadokivore.pdfIn PDF document text
    • http://stavo-bazar.cz/userfiles/file/nazelexuxakimavezo.pdfIn PDF document text
    • http://samilove-payitforward.com/clients/f/f9/f9b0b202ed5d2cb263a89f8a9bd08a94/File/70579374208.pdfIn PDF document text
    • https://peintures-descours.fr/fichier/files/8992097182.pdfIn PDF document text
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/nitivowez.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9430d4de45---14874335318.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/a4cc58c8111704b213281b83c68ea19a/kusipexot.pdfIn PDF document text
    • http://stasta.com/userfiles/file/tagujumu.pdfIn PDF document text
    • http://autoscuolepintozzi.it/userfiles/files/suzopemitim.pdfIn PDF document text
    • https://freshchannels.com/home/sites/freshchannels/public_html/ckfinder/userfiles/files/61162986653.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608e87cd7bfdb---lesebobonesapemuroxu.pdfIn PDF document text
    • https://aymexco.eu/ckfinder/userfiles/files/rozasi.pdfIn PDF document text
    • http://lws-realestate.com/userfiles/files/45990014878.pdfIn PDF document text
    • https://digireg.sk/upload/29548053554.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/rusabirijez.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/xisiruzaxuzodal.pdfIn PDF document text
    • http://marta-galan.com/files/varios/file/fazaxodi.pdfIn PDF document text
    • http://summithigh75.com/clients/867147/File/71183984520.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_off0000df9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF9F 16948 bytes
SHA-256: c3b3113d085d319eb851a1ba16d64870031779b664285a88674b525b0c76de1f
font_01_sfnt_off00010bae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAE 10956 bytes
SHA-256: 1e6e14a55a39f1760200261edfb4c27a6f5c892ae975599b7e55550792c0520c
font_02_sfnt_off0001251a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1251A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.