Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2fbab50d56d3b88…

MALICIOUS

PDF

87.2 KB Created: 2021-08-01 04:10:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0a9acb3b4c1b8f20866fb662fe30205b SHA-1: 923224f5bc5095ce3351405dc50475671749e680 SHA-256: b2fbab50d56d3b883358c0322dd5000fafbdd21bf6fbf53dd60e31b1f2028da9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to potentially compromised websites or disposable hosting. The presence of these links suggests the document is designed to lure users to external resources, likely for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://queure.ru/uplcv?utm_term=namaz+e+nabvi+book+pdf+download PDF link annotation
    • http://industrialsupplies.pk/userfiles/files/47633693870.pdfIn PDF document text
    • http://atya.eu/files/file/ninak.pdfIn PDF document text
    • https://terminal.hr/userfiles/file/17192386319.pdfIn PDF document text
    • http://thesnowmanicecream.com/ckfinder/userfiles/files/kawuzus.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/44e6df8663a543927ca9671cbf399769/84466454335.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/da744d443048cd81d58bc5b052c7e40f/9462842910.pdfIn PDF document text
    • https://www.sistemkabin.com/ckfinder/userfiles/files/12344698799.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a84db4b1c43---rawanakirinofixik.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/648eacb12ebabdb79fd682f1e14bc822/giloxij.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/fidobovixejir.pdfIn PDF document text
    • http://rcp-ranstadt.us/files/56531128288.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fcdb2291518---vowumamiwuzirodewederu.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607221adc9884---befutemad.pdfIn PDF document text
    • https://ckmandarin.com/uploads/73764836403.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a34d25ef88a---81196018725.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/sobanofujomikebebe.pdfIn PDF document text
    • http://szzxwx.com/Upload/Upload/file/2021528850289003.pdfIn PDF document text
    • https://dhesient.com/media/gidogilenifewa.pdfIn PDF document text
    • http://brownmahonefamilyreunion2015.com/clients/7/71/71b8b7811cafefaf2288418346dc0658/File/71534017112.pdfIn PDF document text
    • http://scherzerpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sizesorirakagiludobepatu.pdfIn PDF document text
    • https://bikeid.net/ckfinder/userfiles/files/37340892633.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/ddbj9pesmefvgloere6lsjfcm3/sawozixonosixa.pdfIn PDF document text
    • https://hashtag.school/userfiles/file/29000057652.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e41e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE41E 20660 bytes
SHA-256: 8b7a9ba387fc78556ace2e9f480cdd0c2dd585e8be12f487241c0daaf6d432e1
font_02_sfnt_off00010674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10674 10716 bytes
SHA-256: 461a1fb4c0720db3847b8d6c8640f3dabf04984c402c3f0f4b862d9535da93e2
font_03_sfnt_off00011edb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EDB 17964 bytes
SHA-256: 9620c5f009bf1f35739481c33084dbc664ea77f0277d538dad71e2139c98fa62

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