Malicious PDF — malware analysis report

Static analysis result for SHA-256 147a4488b93aef3b…

MALICIOUS

PDF

78.8 KB Created: 2021-09-05 09:07:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 12f7f4f0c6db044d3a33c32df1006fe4 SHA-1: c73ef6c15257e8ecd3f3f63b13d7e8d396cf00a7 SHA-256: 147a4488b93aef3bde43e0913698772e2847c929c8ab2be461c8a359a74e4811
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress installations, 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 0.9949

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://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/dac6b4a5ce9808c6a0d54a201e0d4615/49445352073.pdf In PDF document text
    • https://tourpon.kr/FileData/ckfinder/files/20210627_E60A089520813B72.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8e5dcc736---lositapolapijok.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/eedbb3934209f302714c468a4c8f7ecd/wosukovureponitosawipan.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa9eb895e2---liroxotilezoxu.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948a72e3e8f---67630853268.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/robuw.pdfIn PDF document text
    • http://csc-0411.com/userfiles/file/20210808225558_r15p4y.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/2ea4p334fgpb3n9gibohv8eo73/fakavoxidizererorevubof.pdfIn PDF document text
    • http://capital96.com/userfiles/file/zuwiwowezomunava.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/junerife.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16123838cda5fd---54874111897.pdfIn PDF document text
    • http://valifyrepapillon.com/clients/6/68/68e1c6a84db99a04c21676ff826d6e37/File/rivinusozafapofav.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/kipumemiwiguni.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/abb0a0012df2e4750cd0246b3e5aedfb/tafasesumuzepozulojut.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b77d91ac6ff---vediguzexe.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/fufipumoxusunejatodo.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/da3ec452ca23004cb1d600bd1b626ba0/55067486566.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/6a523ab18215c89292b60a2790f14e40/lobazigivapafudakexipe.pdfIn PDF document text
    • https://daquin-ferriere.fr/userfiles/file/digapewoso.pdfIn PDF document text
    • http://a9188.com/upload_files/art_files/files/20210905_000153.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/37609b9647adeae15a6136bff366e64e/21130508556.pdfIn PDF document text
    • https://erdenet.mn/userfiles/file/19099241878.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1b2b27ba2---litegomumakigivem.pdfIn PDF document text
    • https://dwitunggaljaya.com/sitefiles/file/85980087307.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=earth+science+rock+cycle+worksheetPDF 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_off0000d1a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e9c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C0 10600 bytes
SHA-256: 33a59da871edb69db12145a43587fce8f553f78e24c666838f2ae8d22084cea5
font_02_sfnt_off00010200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10200 16756 bytes
SHA-256: 04d408ae953fc3863f1b7dc06aa51cb26b80c0c5e5b5acc7552f7a7ca51e7625