Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4701e2d5a7c12e8…

MALICIOUS

PDF

68.6 KB Created: 2021-10-01 00:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 5790f8dccda74d532fcb18b939a7d39e SHA-1: 80c37d221d32f7e4d2dcf5cb8361d786d1c4ccde SHA-256: e4701e2d5a7c12e85f18ad48d3034d50e3175029b4565794b263f57f0198852d
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous domains, many of which are hosted on compromised CMS uploads or disposable hosting, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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 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://kermanrooz.com/img/files/20907537639.pdf In PDF document text
    • http://ambvet-trefontane.eu/userfiles/files/bufobija.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/594g2pqcsfc0p6tl0ag7kjrei7/wixulowiwavi.pdfIn PDF document text
    • http://dawahcity.com/userfiles/file/webenewisigusodiganun.pdfIn PDF document text
    • http://holidayservicemarsala.it/userfiles/files/wugoletesetas.pdfIn PDF document text
    • http://otohyundaidanang.com/uploads/image/files/padozo.pdfIn PDF document text
    • http://ageddfjtjgrade.pretty-match.com/upload/files/wijafinurirajirewadevuva.pdfIn PDF document text
    • http://perfectionistpaintingnj.com/ckfinder/userfiles/files/60463876639.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/161410ed04a476---20660401471.pdfIn PDF document text
    • http://nordicwalkingturak.hu/_user/file/28646623275.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161557dbbf3f14---34155636310.pdfIn PDF document text
    • http://mannadey.in/FCKeditor/file/5012055946.pdfIn PDF document text
    • http://gangwonbnb.com/FileData/ckfinder/files/20210923_9F320FFAB4B196AA.pdfIn PDF document text
    • http://tuzoltosagmihald.hu/userfiles/file/86360147745.pdfIn PDF document text
    • http://abc-tel.ru/data/File/94082488320.pdfIn PDF document text
    • https://cmottaviproductive.it/uploads/file/45279387050.pdfIn PDF document text
    • http://alpinist.store/sribati/editor/uploadfiles/24316800657.pdfIn PDF document text
    • http://eminenceinc.com/userfiles/file/segevomekokozugogebe.pdfIn PDF document text
    • http://www.bordadoindustrial.com/ckfinder/userfiles/files/zomexavexipevodevifimas.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/16153743fe9461---fegur.pdfIn PDF document text
    • http://regmac.net/userfiles/files/vazujubavaroxu.pdfIn PDF document text
    • https://bbox.ru/images/shared/file/57102441478.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/2gr1rr2rkq6l2jbmfibgmbrmct/43194479665.pdfIn PDF document text
    • http://buyyoutubesubscribers.com/ci/userfiles/files/62854589297.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=me+before+you+novel+pdf+downloadPDF 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_off0000af4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF4B 10632 bytes
SHA-256: 58f8f694cedd3bf58e9fe55aa6ef73811644a82f6e81bc6d3125176ae2ffb561
font_01_sfnt_off0000c798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC798 14692 bytes
SHA-256: 996ad8d7a91a2e9feca2579322183ecdf8ea4bd406fcbed3423fc57f9c920571
font_02_sfnt_off0000ecee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECEE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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