Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e421f58e29b4ffb…

MALICIOUS

PDF

73.6 KB Created: 2021-08-22 01:49:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3c906e39766785b159ac1f1a97c3351f SHA-1: d563bdaa5e14f69b4f79fc5b276ed43552451051 SHA-256: 1e421f58e29b4ffb38e2c8969fe063f127e5186a1fe3d126de461d71f806439d
156 Risk Score

Malware Insights

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

The sample is identified as a malicious PDF by ML classifiers and ClamAV. It contains a link farm pointing to various domains, many of which are likely compromised or disposable hosting. The primary purpose appears to be directing users to phishing or malicious content via these embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://catamma.ru/uplcv?utm_term=bhajana+patalu+telugu+pdf PDF link annotation
    • https://eletmodguru.hu/files/files/56195344069.pdfIn PDF document text
    • http://dorisemitchell.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/85801428920.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/bekepipifokadime.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/kuzutizazilog.pdfIn PDF document text
    • http://paraglider24.de/pics/fotos/1/file/26739701575.pdfIn PDF document text
    • https://sportsht.com/userfiles/file/kupumoxaxumurudirejezupev.pdfIn PDF document text
    • https://movimientofamiliadejesus.com/images/uploaded/file/wumemuvaralelevibek.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/e46f9d6cdd826bb9583114a8c278a6ae/kajunoputajonurupiji.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/90b8bcf654ec022f0e02cebea083f94d/zizowibow.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b76f80296b---wumewoniwu.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161010d8489f65---vavofupabaga.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/4569c191eb1f3fa3cd5776d330541edd/84687513848.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/f384c04abe69764eafd67458c69fe64e/58946800349.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c3ce569a0c6---wexedebabokuzenafado.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca7bb7c39f---34707139992.pdfIn PDF document text
    • http://border-inn.com/CKEdit/upload/files/8875872717.pdfIn PDF document text
    • https://equalland.com/uploads/File/gurewutukezexa.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/vazedowabadajebokisupadov.pdfIn PDF document text
    • http://sevennews.com.br/ckfinder/userfiles/files/topiwubogemizoj.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/seginikexasafesidokele.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609a68ec974b8---53305139373.pdfIn PDF document text
    • http://hum-lucknow.org/test/fckeditor/file/nibuxuvufofoweleje.pdfIn PDF document text
    • http://pandoraecza.com/genelresimler/file/sadalemezofoxumaveb.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_off0000bed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBED9 15908 bytes
SHA-256: 57371584fa60864ac610de4c36ab78eb4b4f752c65980ab00da49bb98303be8f
font_01_sfnt_off0000e827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE827 10580 bytes
SHA-256: 40ec5fc4c150d0fb9a74626426ebc564fa97ad7536da141bc2075b9cdf4002cb
font_02_sfnt_off0001000b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1000B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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