Malicious PDF — malware analysis report

Static analysis result for SHA-256 6948cd3ddf384266…

MALICIOUS

PDF

80.7 KB Created: 2021-09-15 18:21:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 974ca7e4063775383803d2e2eba8940a SHA-1: 8c8747d690b828c4d83bbabb093ab1296d030db0 SHA-256: 6948cd3ddf3842661ece9d1e0ce4f84c971b5df07bc64f97078053dc70921040
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous embedded URLs pointing to external sites, many of which appear to be part of link farms hosted on compromised or disposable domains. The primary function seems to be redirecting users to potentially malicious content, consistent with phishing or malware delivery tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://drafthe.ru/uplcv?utm_term=omegle+not+showing+camera
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/ffae949df34f71c9a970d895909d323f/7880461724.pdf
    • http://bon-mar.com/fck_user_files/file/pavesowejigutakijo.pdf
    • http://tieulongcopro.com/luutru/files/2156010512.pdf
    • https://artedelvalle.cl/gal/files/file/mematosaxa.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16141c45d9abd6---95205626136.pdf
    • https://inarsindbari.org/uploads/37007592709.pdf
    • http://phyllisrubensteinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/55678884814.pdf
    • http://maryalo.com/userData/board/file/nividutofiwoza.pdf
    • https://gkscam.com/userfiles/file/55806834191.pdf
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/15fc0dcffba3b93891f07ba2b4dfadba/fitibogakujofavimusuto.pdf
    • https://best-label.com/upload/files/segibowavazebozijozebuze.pdf
    • http://msslink.ru/userfiles/files/tokeletojilakon.pdf
    • https://hkbca.org/UploadFiles/file/20210913160914167.pdf
    • http://f-okinawa.com/img/tmp/file/71057446928.pdf
    • http://abwmarlboropike.com/uploads/files/43236986683.pdf
    • http://www.anclupnapoli.it/userfiles/file/16752057127.pdf
    • http://hotelclinton.it/userfiles/files/99525818306.pdf
    • https://chiuman-hk.com/images/file/nifevul.pdf
    • http://gamboeng.com/assets/ckfinder/userfiles/files/bimonabenedogesovupuzab.pdf
    • https://indiantiffin4me.com/nbloom/fckuploads/file/tiditumesa.pdf
    • http://studiopol.it/userfiles/files/nafik.pdf
    • https://samirkumarpaul.com/ckfinder/userfiles/files/jaxixodiwijuler.pdf
    • https://ausztriasi.spawellness.hu/upload/hirlevel/files/11701072250.pdf
    • http://bhavalaya.org/ckfinder/userfiles/files/ritisevenazonadim.pdf
    • https://rarahil.org.np/ckfinder/userfiles/files/pazitagam.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7e7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E7 16792 bytes
font_01_sfnt_off0000eff9.bin
9aef838188a50b806e5bd9aeb65bd8664121c1e9f91f83d3c54dc443c18eb10b
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF9 17304 bytes
font_02_sfnt_off00011c28.bin
56ccc674c1c98beeddafd9b1443a84403ed9a602d58678c39989e40e0617cd17
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C28 10788 bytes