Malicious PDF — malware analysis report

Static analysis result for SHA-256 2332e9771a57a122…

MALICIOUS

PDF

99.7 KB Created: 2021-07-31 22:53:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 7d10e2132ede4510109dfbda880decab SHA-1: f22f97ba1ff1b96b1a2c6b123ba83ee3dfb1bddd SHA-256: 2332e9771a57a1223d917820a7e42a287c773be34d3c24686baa3d46342834fd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm with numerous URLs, many pointing to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were directly extracted, the structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fc19805312a---xowaserazosowivaluluvon.pdf In PDF document text
    • http://tccsrl.org/userfiles/files/55756708651.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160aa455013aa4---gibawogevoge.pdfIn PDF document text
    • http://electrogalicia.com/electrogalicia/recursos/archivos/69601587462.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/3e04827b0e6d2194b10f1c204b0e6a89/22755223946.pdfIn PDF document text
    • http://dietetyka-24.pl/images/files/buputafo.pdfIn PDF document text
    • https://pmsp-me.com/userfiles/files/67625876952.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/lefulegeradujo.pdfIn PDF document text
    • https://lwim-ouargla.dz/ar/files/40500017806.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a639fdb5a2---tojezojevitifugavu.pdfIn PDF document text
    • http://magyaringatlanadatbazis.hu/dev/_user/file/miwunix.pdfIn PDF document text
    • http://coclub-us.com/ckupload/files/mevofemover.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/396eb8154b0a9680e0ece74332d6c5b5/47621242469.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607862add1d41---zopigudigolovo.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e087b09829---83768140933.pdfIn PDF document text
    • http://app8itebarandgrill.com/admin/images/file/domakataraxipenabopexe.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/336a6d06bc725d0ff1f59132d4e20727/xavokewafawa.pdfIn PDF document text
    • https://gymlesgeants.com/upload/editor/file/zenek.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021050201040726.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609897e7c4dd1---28605677589.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/lv42g9hh0gju5du01qbg04oc26/fetibenuladiw.pdfIn PDF document text
    • http://pumarecovery.com/userfiles/files/36684688014.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/voximefumofulusag.pdfIn PDF document text
    • https://laser123.com/geektic/files/3542936833.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/99e2956c516cdc3188dd65d5c43023fd/sujipifonaratomenerixidon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=how+to+use+lifesource+blood+pressure+machinePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A01 17656 bytes
SHA-256: 4dafdf754465d2f2a32d051d40b4f7104cc8a1c144fc6dda1f21185d436c11df
font_01_sfnt_off000137e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014ffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FFD 11200 bytes
SHA-256: 77f107110201dbbaaa50fddf813932debb209c676305da7a092e16074c3d2c6f
font_03_sfnt_off000169d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169D0 16164 bytes
SHA-256: fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467

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