Malicious PDF — malware analysis report

Static analysis result for SHA-256 59f8e8b7d9d20abc…

MALICIOUS

PDF

113.2 KB Created: 2021-06-29 07:10:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 70630c0b2bddc833d9e8e0e45271ab68 SHA-1: a0e56c2deed483103361ac99dcd7577e119a491d SHA-256: 59f8e8b7d9d20abc908435cf68c3916be3f16dd6450457a6ae0aba47bc02f3a8
156 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to compromised WordPress sites, indicating it functions as a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution through these links. The document body is unreadable, but the heuristics and URLs are sufficient to infer the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d255b41632---tosibala.pdf In PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac53e3aaf66---fozexo.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b06b31dfa2e---78072064798.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/98656377571.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/fee5637c467a78184ec5f59bab6377fe/wagajikukisuma.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/2b66aa27d60ebfec851b4ed3ac61b58b/xotosovik.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b131d0cf8b1---11013661672.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160acf652b166e---roledomosose.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/6b691fafcb5c6450224488e7f45e97da/14037167195.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6d0e1b261---53399100715.pdfIn PDF document text
    • https://saunadlaciebie.pl/userfiles/file/30896249057.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/c5a77fd7d2c1ce18a89356368eefa1c6/44307528632.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/2536bcbb7dd5f56071ec7c728e795e1a/miguzojosaj.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/mevumuroveg.pdfIn PDF document text
    • https://whitesal.com/data/images/file/3197_20210621081143.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/27653623472.pdfIn PDF document text
    • http://vietsaovang.com/uploads/userfiles/file/larusuwizaxebanomajus.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4bab46fd16---wimapafujirepotazup.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608854515f129---jajosafasu.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab3418b60d1---92121510928.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9ce3eaacf---fukagixuvaremelofatafa.pdfIn PDF document text
    • http://gibisch.org/files/files/26937418093.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=twin+turboprop+aircraftPDF 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_off00015071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15071 10416 bytes
SHA-256: 82b72d97f474e8f43e25727ec4bc74c808116e1ec871fda4bbd1457847d27fa2
font_01_sfnt_off000167ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167FF 21532 bytes
SHA-256: a73a69f2db452a7735f6de651ce26084a3743fa3836ad02a24148c7af2aef112
font_02_sfnt_off00019fb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19FB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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