Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7d479f8e2ea560c…

MALICIOUS

PDF

89.6 KB Created: 2021-07-29 17:22:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 129509712ed36f1ce039905ff9d93230 SHA-1: c32da1e38f04726b929f641300b9b63f4ac19c90 SHA-256: f7d479f8e2ea560c5ac47834e24f4edb252951a3cafaca07ae28be8e7df3aa54
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories and disposable hosting. These links likely lead to further malicious content or phishing pages, serving as a distribution mechanism for malware or scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/301146d14231b72ed08e7342bb60c02f/kopugab.pdf In PDF document text
    • http://afghansolar.com/userfiles/file/85557561678.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160dffe1253bb9---48853140178.pdfIn PDF document text
    • http://charontrade.hu/data/file/86619713976.pdfIn PDF document text
    • http://f-okinawa.com/img/tmp/files/72288281940.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821c392b0ce---bosinoridopugivusex.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c45a99bb54d---jologi.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16081844ad6254---zizabodak.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/23pmh88jv9fhdfol7n6bn46ev9/61238870343.pdfIn PDF document text
    • http://apple888.vn/luutru/files/bodabilagal.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/82okepu2cjab3d31hb4dk5tdqn/pepabawegubinadobex.pdfIn PDF document text
    • http://ingatlantv.tv/userfiles/files/gunomujizawasarila.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/9092d16bbd7e6003e70a061381947de8/dumaloxubawu.pdfIn PDF document text
    • http://lightningriskassessment.com/ci/userfiles/files/fukejisorupoza.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/rinefavulitawo.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/v41jbu48i03miocnh6bv167bi5/14564861593.pdfIn PDF document text
    • http://dichvuwebsites.com/media/ftp/file/wumeken.pdfIn PDF document text
    • http://tumwebthailand.com/ckfinder/userfiles/files/82287599965.pdfIn PDF document text
    • http://ashioke.com/images/library/File/67530522925.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f4df83b9f---kujax.pdfIn PDF document text
    • https://churchofgodinjamaica.org/app/webroot/files/78118872749.pdfIn PDF document text
    • http://iphysiology.ru/upload/1076131839.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/eca66431a4ea46fb3e16e6ab375b04ca/vusozuvipumozu.pdfIn PDF document text
    • http://pngroup.pl/ckfinder/userfiles/files/tikapibudanadabet.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a61508fea9---lamopa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=imagem+iso+windows+7+ultimate+64+bits+portugues+downloadPDF 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_off0000f166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF166 11308 bytes
SHA-256: a4b03798f85b3a860949a5cd9100b8d3a047411438e4ddcb47aec64f16af68e5
font_01_sfnt_off00010ba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA8 19920 bytes
SHA-256: 41c5b5bfff0213dc57e2af3713e663d29bc3429d6b6cfc64c5679bb9c81719d4
font_02_sfnt_off00013da4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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