Malicious PDF — malware analysis report

Static analysis result for SHA-256 58e16ccbdc9a0816…

MALICIOUS

PDF

83.1 KB Created: 2021-06-29 06:43:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: fdeceb9ba74d933a58fcee7cd40b18b4 SHA-1: 0ab9182c2639eb0f698f1bd1fe276938d1bb16d9 SHA-256: 58e16ccbdc9a08165b362ca13e8b2ceecf6c1fe351f5f753b1efbe06b2ed6d7f
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, pointing to numerous compromised websites hosting PDF files. These links are likely used to distribute phishing content or further malware stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://churchofgodinjamaica.org/app/webroot/files/tegafidiwifesafivara.pdf In PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d813ce12ba4---1641638078.pdfIn PDF document text
    • http://autoscuolauniversale.it/userfiles/files/42933117404.pdfIn PDF document text
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/34e26fc029ab0228fbd7066486ca9db0/3472163440.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b623f7edf44---wapijoxekuborazaninavelid.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/cp2vngmpq27upbdfuk5tcvrs34/gubokatufokanuletax.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/edmv6a22g1fckrrdsp8enoj9rd/60057421628.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/369elhll19acl5fvds5c2qm7km/dopiputurinebapewepobawi.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/q7sf7vok0b7uinpb73h0i3bi92/71007884027.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/fiwosef.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608252dae452b---34526638567.pdfIn PDF document text
    • http://onestudent.dk/userfiles/file/redukoxufebowaka.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/e265320155a426293c1e2d2c2f988ed5/36249106757.pdfIn PDF document text
    • https://carsen.sk/editor_uploads/system/files/26560374208.pdfIn PDF document text
    • http://windmill-bv.com/userfiles/files/51534293884.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/4agovu83eendvrrrugjoio7lh5/48375724531.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/15483868274.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/57703340162.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/1f5476a4e7614e565b3219a7ee8ac76a/tenafapigudaremijomisaz.pdfIn PDF document text
    • https://nbtele.com/en/cache/fck_files/file/kemowawisomiw.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/0a92fb9f7cf0eb423f6a0a48365a240d/59667296420.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/0e0e76b17f0d43016ffcfe18e85eed94/37219644411.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/14bcf1f8610c3663068096205cdcd8df/11529768458.pdfIn PDF document text
    • http://angeladaniel.eu/uploads/files/nudegi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=2014+night+rod+special+for+salePDF 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_off0000db0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF326 11172 bytes
SHA-256: 18ae39fbfab6d54220b7413013cf602151a555308c5f454943ac91bbc283951b
font_02_sfnt_off00010d0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D0E 18628 bytes
SHA-256: bbd8607ebc5b894cdd66ddc28d3b41d95522ed7b782f97021dafcea5ab89c616

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