Malicious PDF — malware analysis report

Static analysis result for SHA-256 119dd2dd999a9c57…

MALICIOUS

PDF

83.5 KB Created: 2021-09-08 04:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2ab45f5151414b793dc00a854408fc1d SHA-1: 23dbe1cfc2db0efb5f7893637ab8fd8056d67de8 SHA-256: 119dd2dd999a9c57e4ae76b57d512a5c3ca5c3d6e9bdbfeb62455ddd7e64fcd8
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress upload directories. Heuristics indicate this is a link farm on disposable hosting, suggesting an attempt to lure users to malicious sites. The ML classifier and ClamAV detection strongly support its malicious nature, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/5ccfluro1og0vfo985h80fbtn9/texebifadoxuvigusoze.pdf In PDF document text
    • http://xn----ctbguteehkho5h.xn--p1ai/ckfinder/userfiles/files/zubesunubagiwifidibitu.pdfIn PDF document text
    • http://artikos.pl/userfiles/file/kagaradafaxijixuludenuro.pdfIn PDF document text
    • https://manualismedicina.hu/fileok/file/44056001600.pdfIn PDF document text
    • https://suadienlanhhanoi.net/upload/files/wurigatesewavewupunisi.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/10ea56260aacd8d4d7ab420aa948c5e1/92914933185.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160e60fa5ebe17---8752854708.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/qcbd858d9dsp9cgq323fn3tl5i/70245373734.pdfIn PDF document text
    • http://emanuelarombiarchitetto.eu/userfiles/files/buwawuxibarikomawe.pdfIn PDF document text
    • https://agatanorek.com/files/file/53534708523.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/d2vlm2ov6890dhfkfqrhhlb3sm/meterupiledisonimor.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/2302lh7ov9rmi4sgu91ac4t233/12521423715.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160bf3b820fde7---xojejoge.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b1bd9fe8a06---93461145588.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/fopezej.pdfIn PDF document text
    • https://www.playitdirect.ca/ckfinder/uploadfiles/files/2291945087.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/965euprpp8hfcq3n6bccglku7d/fefitekivapogelasepi.pdfIn PDF document text
    • https://kuzeyilac.com/resimler/files/34092516384.pdfIn PDF document text
    • https://landatur.com/files/galeria/files/56972686255.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fd7fbe7d231---lunudew.pdfIn PDF document text
    • https://rajakedua.com/contents//files/pikomexe.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16088d1a1a6a78---42170790779.pdfIn PDF document text
    • https://bravo-hk.com/userfiles/file/mifaxofagabofinule.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/cnjrcej72la59sr9jkt3dqolc6/wozufivurujegapejo.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/27382458876.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=ucl+fixtures+2018%2F19+pdfPDF 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_off0000de07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE07 18496 bytes
SHA-256: 0089303f94bae7ed58f814097ded937718183b631b6e54da219971dcbca5b3b2
font_01_sfnt_off00010e21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E21 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12638 11140 bytes
SHA-256: 9da8fd439adc6da6149897ee032146daa13a4dd2833d022189876d1f6cf4bf46

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