Malicious PDF — malware analysis report

Static analysis result for SHA-256 75ba20f0a5a98b8e…

MALICIOUS

PDF

82.5 KB Created: 2021-06-21 14:09:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 607013658d4177410a326241fa33907e SHA-1: 721a74a17367d156a8f0607a116af9d96d148c10 SHA-256: 75ba20f0a5a98b8e6b8da0d6ff7303d00f92429c005f49b9138f1e32e8d6ed8f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608443585e62d---lezavikesolamagexivus.pdf In PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160839ceacdfc4---zunofolanezepave.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/45792813069.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/difesikoxanikasoxutab.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/41f0cf651e963e69ac478cddb763cda3/31749117770.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/bedecbeebaad11a5358a715ab00d31aa/valudasaluwi.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/7fsudpv0s7ogrgamrqhrrd6511/wezipeputejur.pdfIn PDF document text
    • http://challendor.com/fckeditor/upload/file/28721223349.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/aca1ee6ae514f08b0005bc5cd108a558/43921112788.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160790e7c660d1---silakewatoxabisak.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/ab8566358b13bd0eb6137dfe2f962e6c/pixolipide.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/d3a742eb22ef434d4841fffd5a857b5f/34904643019.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/vqq7j5ebapg0q9utgie80j2j33/reviwofibolanab.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/wegexuli.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080c14dea80f---wuboputoperosavof.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2b46cb5194---kixaku.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/62a8f4e4857f5e01d93e7712b928e5c7/69616068390.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/d94f1af213c01e1885b9eb31ac72059a/89942518753.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/76469a36df9e7599f700677f42f8f4cd/gukaniboj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=azar+hack+ios+2020PDF 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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00011464.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11464 22780 bytes
SHA-256: f5f8bb729c49a9215ad2b1c157666b452aa77bff0e21adff042915e9e11d6255
font_00_sfnt_off0000dbba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBA 5232 bytes
SHA-256: c15fd5b5632814937baf246a6a98ae20c8451be1de7f60c8faf85663faf13542
font_01_sfnt_off0000ed86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED86 11380 bytes
SHA-256: 839c622bafbd8900a04c97b3dfe2a271e1a6b930a1aaba8ab8527fb4f331f118

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