Malicious PDF — malware analysis report

Static analysis result for SHA-256 48b4fcfec6498224…

MALICIOUS

PDF

79.0 KB Created: 2021-09-06 12:42:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: c846d534d5a960d6410c48a2040733e9 SHA-1: 28e3343e7f99ad43a0d371995989d87a8a8d98be SHA-256: 48b4fcfec6498224c3ef9f6419a3cd99010e21eb26170369aec2cd2d26528f4f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a phishing or malware distribution intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4208

Heuristics 6

  • 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
  • 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://allytemp.ru/uplcv?utm_term=the+danish+girl+movie+script+pdf PDF link annotation
    • http://seritour.com/rsm/files/82058423670.pdfIn PDF document text
    • http://rayocazar.com/images/elfinder-1.1/files/file/41065757148.pdfIn PDF document text
    • http://workcoop.org/fckeditor/userimages/file/20210624050425.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a04ef46768c---46524158548.pdfIn PDF document text
    • http://apsencollege.org/test/fckeditor/file/sakasonuw.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/iip0slqvirqg01rgl7f56mq961/21069117520.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2553afd26---jugiluril.pdfIn PDF document text
    • http://jd6618.com/jd6618/file/2021-8/file/LwpCms2021_08_31_18_38_52_7411.pdfIn PDF document text
    • http://dentish.ru/ckfinder/userfiles/files/kelekasesuperowaxod.pdfIn PDF document text
    • https://lacaune.hu/userfiles/file/86624031699.pdfIn PDF document text
    • http://louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/dalaxurixamumegibunarapez.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1610da7142d6b7---rarorukuboxigunegom.pdfIn PDF document text
    • https://likeevent.it/writable/public/userfiles/file/tajifalomidopasej.pdfIn PDF document text
    • https://eamenfaraz.com/cache/fck_files/file/megonitupovodaminixu.pdfIn PDF document text
    • http://daonshop.com/files/fckeditor/file/94185851151.pdfIn PDF document text
    • https://sapsda.org/SapmaUserfiles/file/lumixod.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b47cee61470---foxodibifu.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4ab08653b---18693928357.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/41238c864f887578292ed913f6e23d6e/nirudigef.pdfIn PDF document text
    • http://tutaylamhet.com/storage/ckfinder/files/depekirigusabawamutov.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/50509218700.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/qprd745nu8imj5h9sksq0cnbfj/wupopatalugigosuxo.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e20e16fe8---37694168457.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF9B 18720 bytes
SHA-256: 59fc64742673c12765e08d0bc9e93789a4d11bbd1f5f10ec8323e6485ff2eb55
font_01_sfnt_off00011013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11013 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1