Malicious PDF — malware analysis report

Static analysis result for SHA-256 059df82649d5133f…

MALICIOUS

PDF

85.6 KB Created: 2021-08-14 21:12:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1975de068280903384ba56d7941e4c46 SHA-1: 29b6d76b0fb4b6b197ee8ec7d07f986b41875091 SHA-256: 059df82649d5133f79f1be63f6eec82d926e5acf19842d1550db97a1686ed29c
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many embedded URLs pointing to compromised CMS uploads and disposable hosting. These links are likely intended to lure users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://matfreklam.com/calisma2/files/uploads/murogamoxo.pdf In PDF document text
    • http://angelcabrera.com/FCKfiles/file/xarubajofuvegazi.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/2839cbf5b34ab7e589aad04137d06983/fezixozuzavowejuwuxoku.pdfIn PDF document text
    • http://tverzhilservis.ru/foktver.ru/ckfinder/userfiles/files/21229176758.pdfIn PDF document text
    • https://pensiunea-escape.ro/ckfinder/userfiles/files/gaxofote.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/22831010479.pdfIn PDF document text
    • https://thinkglobalcompliance.com/ckfinder/userfiles/files/digunopur.pdfIn PDF document text
    • http://northcity.rs/slike/files/kezikekujimixunibeguvak.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/80f69b09b840d6ba65417175a268e651/gididuzinet.pdfIn PDF document text
    • http://showplus.ae/userfiles/files/22216833756.pdfIn PDF document text
    • http://taborcapitalpayment.com/clients/d/d0/d0a3925ee25d0adc8806453b18bccccc/File/winakuwuwo.pdfIn PDF document text
    • http://jncs.kr/page_data/file/20210603135804.pdfIn PDF document text
    • http://scheiden-maassluis.nl/uploads//file/86657336084.pdfIn PDF document text
    • http://palakkadtourism.in/ckfinder/userfiles/files/ripezujo.pdfIn PDF document text
    • http://domesticsolutionsagency.com/userfiles/file/2367987280.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/9h0e8sdr2dgh7mdjofj44g8460/41563265416.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16082d9bdecb90---58854093745.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16085fea0423d6---pogin.pdfIn PDF document text
    • http://sunil.kr/uploadfile/fckeditor/file/74956403910.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f9cb74e5acd---jomogox.pdfIn PDF document text
    • https://erdenet.mn/userfiles/file/pebixed.pdfIn PDF document text
    • http://aci-immobilier-douai.fr/userfiles/files/bepavupenejiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=power+rangers+legacy+wars+hack+apk+2020PDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDE 17444 bytes
SHA-256: 51da93d6b82f5da971e213d1934eeeb84bc5d05854dd182ce06f21ba3473134d
font_02_sfnt_off00012cc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC5 10996 bytes
SHA-256: e8550a7a1a51665c2121d088dd370bfe5c7a955d540afb744d9dcdd86dd06cea