Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d26baa8edd83e7b…

MALICIOUS

PDF

93.4 KB Created: 2021-09-02 07:07:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: fab6925fffbaf3636712e2f11b90f3bd SHA-1: 312361b59fe1db076dca3856a7b9d56570a88755 SHA-256: 7d26baa8edd83e7b353b27565f5396faab03e466df557f94fecf4af92cd5b9be
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs pointing to compromised websites, which are likely part of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, with the URLs suggesting a phishing or malware distribution campaign. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://philabc.ru/uplcv?utm_term=pictures+of+nightmare+golden+freddy PDF link annotation
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/16083fe75cfef6---bitakowebesogeladoj.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/88000185963.pdfIn PDF document text
    • http://gimnazjum-krasiczyn.pl/img/userfiles/file/19169368050.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/31985538728.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd7b029911---54634342527.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/qnscga1ii6ouqn9rn0ttlq596o/17032318262.pdfIn PDF document text
    • https://koratspring.com/upload/file/79112639459.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/20420972280.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5c7dc91aa7---10137263110.pdfIn PDF document text
    • http://jorkurojus.com/userfiles/file/23539957978.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a03b612b679---49728137778.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/385888c13e29cfae6b82184461c99728/88430879723.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/wefuwaf.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/7086298352.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/nijobopotigiparirew.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd6e8c6a3f3---bowelupu.pdfIn PDF document text
    • http://cuhs1981.com/clients/8/82/82ca37c076ec4232796cb58ed009bb3a/File/71143749172.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/aec8f537f94e9119bc0b417f7692e636/farazimepoxeposexupo.pdfIn PDF document text
    • http://www.grifin.sk/files/90528296805.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608f59add982e---93143086813.pdfIn PDF document text
    • http://neoneofytou.com/ckfinder/userfiles/files/sevemozudevotufovamemasoj.pdfIn PDF document text
    • https://mmszke.hu/files/file/pimajebuzafim.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/382b62065cbf9bcd41224e91548d9b7e/towakorejuxivinivekezof.pdfIn PDF document text
    • http://crescentcarpets.com/userfiles/file/xuxakatatelejorodirex.pdfIn PDF document text
    • http://broadgatecapital.com/userfiles/file/31088808456.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_off00010502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10502 18620 bytes
SHA-256: b3bd3c0f757c8262f53bb7efc9ed75b613850c1a9c583e6bb83c2241872a70b8
font_01_sfnt_off000135a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014dba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DBA 11140 bytes
SHA-256: 7fa1c2cda0c658313acddcbf478bc1dd985e3f0df634010caa83750835da04dc

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