Malicious PDF — malware analysis report

Static analysis result for SHA-256 808d2eed7fd4d785…

MALICIOUS

PDF

71.3 KB Created: 2021-09-01 00:32:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7d2f548344ad284f87ee18032c560acc SHA-1: 70879f369e8bad68b103dd33180909c23a2ab4d7 SHA-256: 808d2eed7fd4d7857d7c4ef6a708da544f6466b6190fee72db4fb3297889c8ca
176 Risk Score

Malware Insights

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

The PDF employs an image-based lure, typical of phishing campaigns, to entice users to click on embedded links. Multiple heuristics indicate the document is a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute malicious content or redirect users to phishing sites. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 71 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/161123e67be483---pukigogibujisogubufilimi.pdf In PDF document text
    • http://jjw-led.com/userfiles/file/37805507227.pdfIn PDF document text
    • https://izometal.net/mm/file/tutud.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b954c5cf90---80185455663.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160f4fe13998e1---nelazubabufuxub.pdfIn PDF document text
    • http://zangerlelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mozapubegapufotenujudog.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f437b6d6191---33447562489.pdfIn PDF document text
    • https://drsaman.com/files/64955512989.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607832e2b2415---xodexadutefisexisalop.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/gowomemik.pdfIn PDF document text
    • https://nhanloc.net/userfiles/file/53467118517.pdfIn PDF document text
    • https://diphong.com/uploads/fezirope.pdfIn PDF document text
    • https://psg66.ru/admin/ckfinder/userfiles/files/33646009927.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fc442638491---sekebopebizobag.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021050313180149.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/b2a3b2caf05157b52f61ac733fd899f4/mibep.pdfIn PDF document text
    • http://dymenahealthcare.com//upload/fckeditor/file/15250688651.pdfIn PDF document text
    • http://jlm-kg.com/uploads/file/vafubipitigupuj.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/710b2f2d9911843e13f932728c0f6968/rubisewanifigevasusali.pdfIn PDF document text
    • http://edumedcare.pl/upload/files/63314537092.pdfIn PDF document text
    • http://uro-medical.pl/zdjecia/fotki/file/88538148360.pdfIn PDF document text
    • https://vanrun-it.nl/userfiles/files/296608301.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/bed51ebf4ad24cfaf2e7dad08cd8dc44/3973323317.pdfIn PDF document text
    • http://kleiberit.ru/files/file/tomanifufuxidosawiripoz.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/49ba6e315857aa25fc0bcd55e0f8a532/25082907851.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/zitelu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=centerpoint+crossbow+sniper+370+reviewPDF 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_off0000b943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB943 10828 bytes
SHA-256: 6a8cb72bc9527a78f77f27931d4e61c0ad2047d533cfedcc612d3745e57fa170
font_01_sfnt_off0000d247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD247 14072 bytes
SHA-256: b227e22bf5d395355a6cdb36459dc82319f6bc1ede32f7a26e52e2820090cf43
font_02_sfnt_off0000f51a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1