Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0ce6e900192a806…

MALICIOUS

PDF

111.0 KB Created: 2021-07-08 05:02:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: db0d47da2e998868960e80d4045ffd62 SHA-1: 90f8d5949db63da8741b16857caaed86e792a0de SHA-256: b0ce6e900192a806886368abdbd81ed8f4211ffb43c939833c8369ac5f3ad2eb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress upload storage, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to trick users into downloading further payloads or visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://40parables.com/wp-content/plugins/super-forms/uploads/php/files/40c8f2b0435a94145095ef76fee567b7/govapunu.pdf In PDF document text
    • https://eastmanllc.net/ckfinder/userfiles/files/jalidopalafujonetuzodu.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/n3v6d0fjj0j2o0952f2s2cllb3/rufimijexitebapovodude.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b21f40062---miwakujibovu.pdfIn PDF document text
    • http://3e-recycling.ru/app/webroot/filesfiles/93879545566.pdfIn PDF document text
    • https://apotekatia.ba/fajlovi/sakiluborejetanux.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160777e8849828---6455025879.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/bj1q2ec99cqfh99ij3avnpgq10/34040854418.pdfIn PDF document text
    • https://grandhotelbulgaria.com/userfiles/file/37446044366.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/23549638945.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16084e3d83d528---jedolivala.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/91995811403.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/86028372757773dd547389c0beaee0cf/buduzedag.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16083b7d6756a5---puvazupizaka.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/e68d94a532e358dee97cb329234fbee3/98955635313.pdfIn PDF document text
    • http://netinflux.net/userfiles/file/8902419653.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/21aa7be710f8d6b80b5a4bd00b71b851/61631693132.pdfIn PDF document text
    • http://danguykhoidoanhnghiephp.vn/Upload/files/31942519556.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160852e4ca2b6b---80140335001.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/66247495482.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609caf68a84a3---gexasokudisesareliz.pdfIn PDF document text
    • http://www.bash.cl/media/file/22642059765.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/dfmvtrvrd1k92it88l6u549cr2/10680465015.pdfIn PDF document text
    • https://serwisnawigacji.pl/userfiles/file/40082494013.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=disadvantages+of+using+hydroelectric+powerPDF 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_off00014776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14776 19944 bytes
SHA-256: 1d2cd13b54436e0ac8a85d10bede08eac42c3300ef0250a1fa9290f94652cf4f
font_01_sfnt_off00017be6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17BE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000193fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x193FD 11268 bytes
SHA-256: e82f16085835653281d99b8819fb23e93c66d931788d0706ded4b547c47a35f7