Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6f9c29dfcabf0a2…

MALICIOUS

PDF

85.1 KB Created: 2021-06-26 10:45:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 14de235e70f7883425de471eeadf2364 SHA-1: bf3e2fca6c6b270dbb8bbe5c231a750563ca90dc SHA-256: f6f9c29dfcabf0a20549556d1977f8421d6eadc6ffbadbfd46e22ac64435a4a5
196 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to compromised CMS upload directories and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is a phishing or malware distribution vehicle. No scripts were extracted, but the presence of external URIs and the overall structure point towards a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://catamma.ru/uplcv?utm_term=levothyroxine+cause+weight+loss PDF link annotation
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/6d1a15d41d0ae4f651530b06c52e0ea3/xinura.pdfIn PDF document text
    • http://huucodatlanh.com/userfiles/file/pevosetejorug.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/02e62480e5c1481da373e4b1a78cc841/zebadovikuwov.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/46pfle08rslm5ndnht2s8c6ap6/nurorelenunogogagawi.pdfIn PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/47963333246.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/nibafuin59oiqpphl95svvqbii/furitudikofa.pdfIn PDF document text
    • https://charlesstreetvideo.com/userfiles/file/12045019868.pdfIn PDF document text
    • http://aydinservis.com/ckfinder/userfiles/files/xadajewuraf.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/1743459107.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/n9coenmb1vvifn60dn1trrd606/96337527052.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/9078d4e8d4d1030d303669f5801e125f/mumufuvaduguwo.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160864ce473ef7---govulafepegejevotumavovu.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/80939706530.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/3a19d8c41f9b9517daf3d1d7f976428f/79375124953.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608346165dd41---50724409142.pdfIn PDF document text
    • http://qiuyutv.com/userfiles/files/20210613084420.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/nm0ltkm3o6t9mfsqj34pa18g6i/rotunomijubex.pdfIn PDF document text
    • http://maychamsocda.vn/images/userfiles/file/9935872541.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa9a9a6f10---libidajatuxoromolebexil.pdfIn PDF document text
    • http://www.tokyomagic.jp/images/library/File/71377017910.pdfIn PDF document text
    • https://kasihpaham.com/contents//files/nifovezizoderolagav.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608c109cdf2d4---vejafufowoxokefibo.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_off0000e94f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94F 16944 bytes
SHA-256: adf659acfb6f79f05d23e41f0135431bfa8a994cb5d2699f9aa3dc1a6a8db8a5
font_01_sfnt_off00011598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11598 10936 bytes
SHA-256: 7bbb49a8644c2d9dc493ead8090e793f75847c0e44f5defc63bf9f5bc4bb501f
font_02_sfnt_off00012f0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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