Malicious PDF — malware analysis report

Static analysis result for SHA-256 d54583c76d3ad743…

MALICIOUS

PDF

81.3 KB Created: 2021-08-10 01:26:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: fadc163df56598dcc9b55776d669f97b SHA-1: 784b0a50b245667437c8d21d60c43a918dc544ff SHA-256: d54583c76d3ad7431e9e22edaa2f9354c462e32ea70c213b6ac2791d37af7b63
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other domains, likely to redirect users to malicious content or downloads. The presence of multiple external URIs and link farm heuristics strongly suggests an attempt to lure users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://petraifevronii.ru/ckfinder/userfiles/files/6329014526.pdf In PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160d6edbe8eac7---4035223753.pdfIn PDF document text
    • https://texigo.tw/upfile/files/2021/07/17/jitoji.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/gejuko.pdfIn PDF document text
    • https://elnativocoffee.com/silver/upload/files/25319820483.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/brgb0fjv3c9b3iatmceh3eql7f/legamiberefabedanaxov.pdfIn PDF document text
    • https://otartufo.com/ckfinder/tartufofiles/files/jigigapamun.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/60e71edcbf4edb272f8acd259c6698e4/11434285699.pdfIn PDF document text
    • http://emons-verlag.net/testarea/cwsCMSlight/media/files/81559660756.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/udea5nnfo42d6u711pq16r71de/tumanuzonumivarup.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/74107390692.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/84789738644.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/d1836ick6ng3liej5cpicncpp3/dapol.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd687a04dd---pewanokeb.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/vfetf33spda6rqo24veb5kkglj/wumitujogepuw.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acc19808944---sonexovekezi.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc995e6939---mubopigiwe.pdfIn PDF document text
    • https://www.jaegeraviation.com/ckfinder/userfiles/files/bexasadedikuxovisexek.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/xepati.pdfIn PDF document text
    • http://www.asap-recruitment.net/upload/file/48076460933.pdfIn PDF document text
    • http://5mal4.de/moneyvidya/web/images/userfiles/file/mibasozasorofixi.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b442ad13b---gixadazidotisegopove.pdfIn PDF document text
    • https://ph2020.org/ckfinder/userfiles/files/sudaxaferijasolarunoxap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=livro+aprender+coreano+pdfPDF 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_off0000d8ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FF 18536 bytes
SHA-256: 90533bb92e9fedae781a74c13f4bd13cc0d2016c5eeaaa07bd863885805a7204
font_02_sfnt_off00011e7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E7A 10324 bytes
SHA-256: 445363b22bfb846bccb14683f2d5c6c4e137e42403e54ea4e73027792ece2612

Open this report in the interactive analyzer, or submit your own file for analysis.