Malicious PDF — malware analysis report

Static analysis result for SHA-256 5466226898a3b108…

MALICIOUS

PDF

80.5 KB Created: 2021-09-01 07:30:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 49fd4461e1a69fbb2895d7c8a8a44e48 SHA-1: d7cf8817d83999e6f5a8bb29daeca1ff9f19081f SHA-256: 5466226898a3b10858c093030353ef5812f8ffb3a37f4447a0620d74983cd238
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links, many pointing to compromised WordPress upload storage and other potentially disposable hosting, suggesting a link farm designed to redirect users. The primary purpose appears to be directing users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://mountmoriahcamp.com/media/30562380577.pdf In PDF document text
    • https://lhorizon.ca/uploadHorizon/file/bojejukud.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/0d43175ff1898dcd3ea766c34cbc5a53/17045032522.pdfIn PDF document text
    • http://gdgom.com/upload/file/210828084337428636ll2xwd3nelv1.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/p2veagdja5ie2bk28m4amfcup3/goneruronasofepegis.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/kebezexurejafizegole.pdfIn PDF document text
    • http://meadspool.com/clients/8/8e/8e46726fd42f39913d2349bbdb4e70c4/File/losuwoke.pdfIn PDF document text
    • http://daindnc.com/fckeditor/userfiles/file/vumoxabiwisavafemuk.pdfIn PDF document text
    • https://ladangmimpi.com/contents//files/79688853520.pdfIn PDF document text
    • http://goref.ru/files/file/2990728467.pdfIn PDF document text
    • https://ceccarbotosani.ro/userfiles/file/velovejofizapupakozo.pdfIn PDF document text
    • http://qiuyutv.com/userfiles/files/20210831121903.pdfIn PDF document text
    • http://boothbayharborshipyard.com/userfiles/file/99320368941.pdfIn PDF document text
    • http://khamtribacninh.com/images/files/wavufugalupoxope.pdfIn PDF document text
    • http://vladekoservis.ru/files/47103912285.pdfIn PDF document text
    • http://bradhelferlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/36148904555.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/c53b3a65374c850388255c39f1b6de10/1926480626.pdfIn PDF document text
    • https://avela.md/userfiles/file/81592077162.pdfIn PDF document text
    • https://k-barrierfree.com/FileData/ckfinder/files/20210812_90445C5B71285F4D.pdfIn PDF document text
    • https://bruceautoservice.com/files/file/refolezun.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/jh452igtpvgqsbos8c896sot31/negobadenosesuvaxu.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/306cbce8bafae8156adc86c9794c5dc8/87971576773.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c302dbe422b---pokuwasisekijalenibadap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=how+to+tattoo+with+a+tattoo+gunPDF 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_off0000d5bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5BF 18980 bytes
SHA-256: 2d68c10f4731160e80161aeff2756550829d7b139531b7974320ff5c4b272923
font_01_sfnt_off0001064a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1064A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E61 10120 bytes
SHA-256: bfe6f578c83c2bfeef34728c730ca62b15742b5ae1e171cce86cd54ddd13588a

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