Malicious PDF — malware analysis report

Static analysis result for SHA-256 be201e69b072bc82…

MALICIOUS

PDF

75.9 KB Created: 2021-03-24 09:45:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a3329710d09c6f57c2bedb0de5733af5 SHA-1: e6a99be126d425307e9afba9cb6b891635c70247 SHA-256: be201e69b072bc82f4faf7076702e5c877b8d3c789fb0c81e7abd92cb574600b
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated maliciousness. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially malicious sites. The document body, though heavily obfuscated, contains references to wkhtmltopdf and a date, indicating it was likely generated programmatically to serve as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/strik?utm_term=what+channel+is+the+rap+music+on+directv PDF link annotation
    • https://cdn.sqhk.co/buvaboda/fhdHCzg/14110636632.pdfIn PDF document text
    • http://padigixatobezu.22web.org/acls_guidelines_stable_ventricular_tachycardia.pdfIn PDF document text
    • http://kipokefurur.mygamesonline.org/does_chamberlain_keypad_work_with_genie.pdfIn PDF document text
    • https://cdn.sqhk.co/vowogada/fjg1lii/online_re-_admission_form_of_ignou.pdfIn PDF document text
    • http://kenufapozij.22web.org/honeycomb_cardboard_sheets_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/Daejdgg/absorption_rate_in_real_estate_formula.pdfIn PDF document text
    • http://gepavozo.mygamesonline.org/47145361275.pdfIn PDF document text
    • http://kewokuxumuzig.medianewsonline.com/introductory_mathematical_analysis_book.pdfIn PDF document text
    • http://befotuke.mywebcommunity.org/88045787160.pdfIn PDF document text
    • http://rofogukiluvupu.mygamesonline.org/nimowakilunewisijeroxej.pdfIn PDF document text
    • http://biomaniix.website/58428402597awm8n.pdfIn PDF document text
    • http://getallcreditscores.info/381572147921rdrl.pdfIn PDF document text
    • http://jezojarugeboz.22web.org/antipsychotic_drugs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ligoroxenafof.atwebpages.com/world_of_darkness_combat.pdfIn PDF document text
    • https://2e907eb7-0cdb-46e5-a4de-ff0e34d1b96e.filesusr.com/ugd/7ea2c5_2c98122738514255875644fbd690ba02.pdf?index=trueIn PDF document text
    • http://popuzavefigud.epizy.com/14125159654.pdfIn PDF document text
    • http://tibamupebunod.atwebpages.com/dubitupatilujatepiwir.pdfIn PDF document text
    • http://sukokovevaz.atwebpages.com/scientific_paper_sample.pdfIn PDF document text
    • https://dbb1fad9-9c05-458f-9e32-bc0b7f65d7ec.filesusr.com/ugd/451461_563d6ff1ddac46a3bd5c6a8f02ebabae.pdf?index=trueIn PDF document text
    • http://nopawalaxuwaw.onlinewebshop.net/as_is_no_warranty_form.pdfIn PDF document text
    • https://77ac2d45-d533-4b4b-a85c-01e81860bff9.filesusr.com/ugd/7f1ad7_3d9125dbc4914aa0a6b85636c18232a8.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e88c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88C 5388 bytes
SHA-256: de8c256702fb9614b4b74ebb51bd31d4e9196c0cbc4039deff433bf7960f938f
font_01_sfnt_off0000fabe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFABE 11684 bytes
SHA-256: cebddc0960a471136583d9497b800656dd23c02b577e9aa7b4d91d53f88f8d94

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