Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0e08033f8d2daa4…

MALICIOUS

PDF

96.6 KB Created: 2021-09-06 12:46:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 01f66d0cfedbb296616d1da93e95d2dd SHA-1: 4a4f5049fe7d9ff9feee6750707862b634a72cb2 SHA-256: f0e08033f8d2daa4c57d74c03ec89db284d547566fed2a72bff460f4ec270471
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, indicative of a link farm designed to lead users to malicious content. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The document body is heavily obfuscated and unreadable, suggesting it's not intended for human consumption but rather to host these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://huntic.ru/uplcv?utm_term=copes+vulcan+d100+actuator+manual PDF link annotation
    • https://cepatdaftargroup2.com/contents//files/13460217196.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/81705745220.pdfIn PDF document text
    • https://baoyi-chuck.com/ckfinder/userfiles/files/doxuvogusufijomawa.pdfIn PDF document text
    • http://ladyqueen.it/userfiles/files/kexewug.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a499c48b672---32116950868.pdfIn PDF document text
    • https://baohohoanglong.com/userfiles/file/70663982033.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/315efe1ca1be333d7f0801c64d807142/23956490140.pdfIn PDF document text
    • http://veterina-hrib.cz/user-uploads/files/99530237782.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/6vr4915seo8o1cp70k0hll7p1k/diman.pdfIn PDF document text
    • https://bhsbeacon.com/FCKeditor/file/99773466611.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bdedab296fb---sirigaxumavaro.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ccaf7d39e5c---nekilutekelowiwo.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/59a7e0a192bd9cf8852ce55eb53aa273/25963043684.pdfIn PDF document text
    • https://www.jancsoalapitvany.hu/ckfinder/userfiles/files/24269699864.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/mimovomali.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/118293631.pdfIn PDF document text
    • http://snsi.jp/image/news_file/velimotoranetanu.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/721c2f570948d8b5c9a40d442cf976c3/64603739092.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2a30939dd6a6685150d14f4e323c1117/betaxujurikokiwagalum.pdfIn PDF document text
    • https://nhadatonline24h.com/Images_upload/files/59900794184.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///49211221482.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c1de6a43d44---40252456747.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16076d78035185---rofelarotupasevi.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/in1takphmu5lgbjql68jlrmltl/fidusogufunuwogejudikijew.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/17672066260.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_off0001126a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1126A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012a7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A7C 18828 bytes
SHA-256: 435095a866a0011f259ac37e9b62f456d72bdd3d4ff8035405e7ef22dff9d4c1
font_02_sfnt_off00015b18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B18 10952 bytes
SHA-256: cd303f1b6a1eb8c2d8b9b61db44980c7952c7e4b09abeced0fc1f2b5272ae909

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