Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2d318eac4f26707…

MALICIOUS

PDF

109.0 KB Created: 2021-07-03 22:46:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 30976c1040243bd6dfb8e074398eac72 SHA-1: 13c7f30f0d80e84fb063906ec326b5cb1160a201 SHA-256: e2d318eac4f26707817263ee1c6076966b8d9de93cfbb07ec7ae2c0d7d081d29
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is identified as a link farm pointing to compromised WordPress upload storage. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the document's structure and URL targets are sufficient evidence of its malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9931

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://smidgel.ru/uplcv?utm_term=dwh+concepts+with+examples PDF link annotation
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/gi2mefu5f7cme7hr705fhnjhf5/titiki.pdfIn PDF document text
    • http://cuuhoatudong.com/upload/files/67311296465.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5374723a7f---dedupizuvoloropog.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b2fa7893e50---puxaxezarudogekuno.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c680b85727f---62263423406.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/f3e82c1b495821782da661b733d4bccf/25653168944.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d900378d6d9---12591244607.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071654e3e49f---49454239457.pdfIn PDF document text
    • http://texmet.pl/userimages/file/68198015373.pdfIn PDF document text
    • http://kppzp.pl/userfiles/file/bupojowototegewiromage.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/7fc687bf10b389b906ed6898f1675520/7555570759.pdfIn PDF document text
    • http://yorktownhs1987.com/clients/57482/File/36324573932.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160783648524f7---jotegi.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160a28a1fb2d1f---xedoxazesibonefinibu.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607943b361f09---wiled.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/sji2mblntqnf9t8t9mjk7l12ej/jujepejawerusegedemena.pdfIn PDF document text
    • http://ineke-ott.nl/keramiek-beelden-imagesfile/furusateviv.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd1b00e143---jeluju.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f9264848e4---82856060823.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160723e4d9032c---ganazomepaxudunelinuziz.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8817dbcb2---95600283140.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/63a132ca9d01be1bc9a0a9ed322678c9/39058356105.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/527e95a425235b2781ef91619e82bc15/30996843626.pdfIn PDF document text
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/780971e23347a884709c69bae74f5844/kotofizutoposape.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/afff70a8f548b366baff416aecb6a60a/zokutakapadipebetipoj.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_off000148b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148B5 10728 bytes
SHA-256: 5db242f5d3e30baa0c415a13f95d22ef843e0b4f3e09699ae3cf4187f3002e2d
font_01_sfnt_off0001613d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1613D 17468 bytes
SHA-256: 588723d8b4e213b51bac259c77ac1ffb06e8b00dc6e3fa61a7658d1c0fd4aff5
font_02_sfnt_off00018ebd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18EBD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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