Malicious PDF — malware analysis report

Static analysis result for SHA-256 988dec9ee8ad8af7…

MALICIOUS

PDF

80.1 KB Created: 2021-09-06 08:52:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 826d3b775c3f0bc1fa6e5076a62405d9 SHA-1: 296f0934388f2274f19d6e4973bb0476ff9c02a1 SHA-256: 988dec9ee8ad8af734067181aba339934db43e4fa81702c5a0a4407187f2c7bb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating it likely contains malicious content. The heuristics reveal it functions as a link farm, pointing to numerous external URLs, many hosted on compromised CMS uploads or disposable domains. The primary purpose appears to be redirecting users to potentially harmful websites, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://iphonerepairservice.nl/app/webroot/files/userfiles/files/najilenexefitiro.pdf In PDF document text
    • http://someteme.com/archivos/_20210809155635.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c3de17b77d---jiloloputudobuvavekuraf.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/16087271c4bbcd---78997657600.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7fe4612e9---69896769246.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3873a837b6---tejosunog.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/s58o3duo3fui4tuo1ik0ia4i27/81278503363.pdfIn PDF document text
    • http://joesservicecenternj.com/userfiles/files/49992268644.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/80752324476.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a18bbbdd998---mifelopoxapi.pdfIn PDF document text
    • http://krajinar.cz/soubory/files/52957844228.pdfIn PDF document text
    • http://niktid.ru/userfiles/file/guwojojeguniwipezoxuko.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612a39517e6af---21296142077.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/5p9otpcb9e7n3chcums6vs8ea9/bowolopumaleminoxo.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1716b88a04---21482763351.pdfIn PDF document text
    • http://cgmorenanews.com.br/ckfinder/userfiles/files/40462580650.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16129dfac7938c---dawul.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/25428113410.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084c147b1f69---vuvosoxiwobazogonogigab.pdfIn PDF document text
    • http://altadirezione-consulting.it/userfiles/files/daxavan.pdfIn PDF document text
    • http://akifkasaboglu.com/esatfisek/images_upload/files/31439039498.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=libreoffice+draw+tutorial+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_off0000d048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD048 10624 bytes
SHA-256: 38d5641a8a7d6052ac533eff99976dda63cb63d5ae20cc671e2df66c3e2178df
font_01_sfnt_off0000e888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE888 18716 bytes
SHA-256: 69eed08405ba897de628c1637d73eec9ec4c50e63236064f069040346eba4d4b
font_02_sfnt_off00011992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11992 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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