Malicious PDF — malware analysis report

Static analysis result for SHA-256 46eb5c7d70d9940a…

MALICIOUS

PDF

85.4 KB Created: 2021-07-03 06:06:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c9a8a0f4a420785644e821ef017c6ba2 SHA-1: 38ec341a87c35285b23b1bd78a2fb69979b5fe96 SHA-256: 46eb5c7d70d9940ac30a1fc3c904306c5bfd9df00a438a8c1969485b357fa0c2
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URIs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The heuristic firings indicate a pattern of link farming on disposable hosting, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://krisoc.ru/uplcv?utm_term=white+rabbit+with+grey+ears PDF link annotation
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/8444a9d0afe00271a25c523b3b8256d0/12886006501.pdfIn PDF document text
    • http://maraulsan.com/ckfinder/userfiles/files/pigusabevavile.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/8a2978934fc1f2e66c8928444330af49/jidugurexikisivotuvepul.pdfIn PDF document text
    • http://brightwayconsultancyservices.com/userfiles/file/xatujupovelijuw.pdfIn PDF document text
    • https://www.truegridpaver.com/wp-content/plugins/super-forms/uploads/php/files/e295931cd0909144c9cccdd83fb7b172/75832605713.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608781650dca4---pugalosukiv.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/2hscc3gtj9q9oja3tupitn8p73/razukisepef.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/79fde84e8b322430091cb0692f4c9c92/11788865031.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/60506880680.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608f61d463f7e---gopalewu.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/rutifimogalajuviwamifawob.pdfIn PDF document text
    • https://vibangnhadat.com/uploads/files/kibebiraxuxewopulajeveru.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/9q43qe2gvukhavs8f25ss15qu0/8830257383.pdfIn PDF document text
    • https://a1-recruitment.fr/v2011/Files/fck_upload/file/pajisezomazigiw.pdfIn PDF document text
    • http://martom24.pl/martom/userfiles/file/kalasetut.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be4946177b9---zitejibi.pdfIn PDF document text
    • https://esz.jp/img/editor/files/50545839038.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/b0c748e4fa0ee1c38f29b88e2e040874/lawutivunarufudex.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/281724a341e46c8ef253ae24b5b63aa5/lusoladudojulalexo.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160a4777c57495---zovigokadatuk.pdfPDF link annotation
    • https://netshopnepal.com/userfiles/file/jotojowuk.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/de48c77a2e4ae8bb31135b77c090c752/28197701119.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/64928cb53a2f4b3d0ee124e76dd1d3fe/xezamisupemoseka.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_off0000ea74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001028b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028B 10452 bytes
SHA-256: bd526e1576e0897cf2d780de217a84523bc35e04224122b075d588a1c2bc6e56
font_02_sfnt_off00011a7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A7C 18192 bytes
SHA-256: 78b7d216cc004c63063159834cd1e21ea7becc5c51e9369dc026104a1734f952

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