Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9b7c1950a4ec44b…

MALICIOUS

PDF

83.8 KB Created: 2021-03-22 21:22:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23cd424a68803a39f5ea111be4ff35b0 SHA-1: 9cfee6bc582ed5cdc9b9b7d9358bf246ef2d9e1b SHA-256: b9b7c1950a4ec44bb407a2d624277a69e4218b2a6e205426c8481f8fd8f57871
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which point to PDF files hosted on file-sharing services, suggesting a link farm or SEO poisoning tactic. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/wix?keyword=witchery+circle+magic
    • https://wamexololizod.weebly.com/uploads/1/3/2/7/132712163/faziw_dejakolujevu.pdf
    • https://galojonebe.weebly.com/uploads/1/3/4/3/134353990/xabafapukipej.pdf
    • https://cdn.sqhk.co/dutudovajud/nicgjgj/infectious_disease_doctor_dallas_texas.pdf
    • https://cdn.sqhk.co/wutalididow/aVgficT/83696731386.pdf
    • http://dafesoxexigu.medianewsonline.com/ap_drawing_portfolio_concentration_ideas.pdf
    • http://bivoliku.mywebcommunity.org/small_fry_download.pdf
    • http://butalinonoruma.scienceontheweb.net/lm317_voltage_regulator_datasheet.pdf
    • https://buparemekixa.weebly.com/uploads/1/3/0/7/130739227/jumedewe_vafojo.pdf
    • https://bosamekuxukis.weebly.com/uploads/1/3/4/6/134672370/c7a6b27371c.pdf
    • https://jivikusobule.weebly.com/uploads/1/3/5/3/135326696/7831082f9aa.pdf
    • https://xedasijaw.weebly.com/uploads/1/3/1/4/131453620/rorelidufibefos.pdf
    • http://vuwiwetidajin.mywebcommunity.org/15077816860.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e0ec27e3-3bfc-41e3-92f6-1e183c8a2058/what_does_son_of_man_mean_in_hebrew.pdf
    • https://uploads.strikinglycdn.com/files/c9afda00-2fd2-47dc-8308-5674e2df3cef/15432370827.pdf
    • https://uploads.strikinglycdn.com/files/9498b4c2-b40d-41bc-b4bf-a75451cd3443/what_color_does_red_and_yellow_food_coloring_make.pdf
    • https://uploads.strikinglycdn.com/files/2549b2bd-3b3e-4cfd-b949-851990f45511/what_is_the_significance_of_religion_in_society.pdf
    • https://uploads.strikinglycdn.com/files/d1835987-63b9-42bf-884c-6b86a6cac5c4/sufosata.pdf
    • https://uploads.strikinglycdn.com/files/2464516f-7b2e-45e6-9f1e-bf44330fbbb9/sirowiwokepoxikised.pdf
    • http://zegiwewezenaro.myartsonline.com/revemawinibuxezukavedowo.pdf
    • https://uploads.strikinglycdn.com/files/7971cc4b-ce0e-4dac-93a6-d8528b9bca48/86868674283.pdf
    • https://uploads.strikinglycdn.com/files/e361b587-5279-404f-a46c-d9bc93841208/what_is_the_best_volcano_to_see_in_costa_rica.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010bff.bin
e0e6d17aa2a24b00e0d0f4dfbd86da7d24f2c3c494da6ed4e837fbd1c0c34489		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFF 5152 bytes
font_01_sfnt_off00011d6d.bin
b4c66b0a6d7e5b40f28e4b25330e8c3b1175ad8bc1824a9f982704c24a27a19e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D6D 10644 bytes

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