Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d11d6a8ffcf0bbc…

MALICIOUS

PDF

75.3 KB Created: 2021-03-14 04:23:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 2af472d2d9af7e546dec670ce984c14f SHA-1: 8de9b0c1a873b4d2ae9c809a9f2973f237f736a7 SHA-256: 4d11d6a8ffcf0bbc785375f44e2c1bc5ad09a03a9a697aaaeb9ca3036dace852
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 ML classifiers, indicating malicious intent. It contains numerous embedded URLs, with one prominent URL pointing to 'dugedepap.ru' which is likely a phishing or malware distribution site. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host many links, potentially to distribute malware or phish for credentials under the guise of providing downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dugedepap.ru/strik?utm_term=lenovo+thinkcentre+m82+drivers+for+windows+7+64+bit+download PDF link annotation
    • http://dewiluvafaridi.22web.org/boyle_s_law_practice_worksheet_key.pdfIn PDF document text
    • https://xizuzesujebowu.weebly.com/uploads/1/3/4/6/134666185/90933f6.pdfIn PDF document text
    • http://juluzenaluziwo.22web.org/area_of_irregular_polygon_worksheet.pdfIn PDF document text
    • http://copyrightnotices-form.com/easy_birthday_cake_recipes_for_dogs6gcwh.pdfIn PDF document text
    • https://verosogoteri.weebly.com/uploads/1/3/4/7/134738646/jesafi-kixipivedaw.pdfIn PDF document text
    • https://ligiponofejejo.weebly.com/uploads/1/3/4/3/134346234/muvizurimu-siferetufifiwax-sojup-veleveralun.pdfIn PDF document text
    • https://nikatomorufaxeg.weebly.com/uploads/1/3/1/4/131437252/1149801.pdfIn PDF document text
    • http://reactivaperu-viabcpi.com/systems_engineering_internships_uk9dp00.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xenilesaripesu.epizy.com/bhoot_returns_full_movie_hd_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/operations_research_jobs_in_bangalore.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/the_honest_courtesan_book.pdfIn PDF document text
    • http://jedekikubo.epizy.com/download_driver_for_dell_v313w_printer.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/icici_prudential_balanced_advantage_fund_fact_sheet.pdfIn PDF document text
    • https://cad90261-f038-4e8a-b384-2e0e37e6cb8c.filesusr.com/ugd/4c4e45_04c6e9d3c69c45fc9e0fd1e84c62a87a.pdf?index=trueIn PDF document text
    • https://1f53f175-067f-4140-b001-f66bebc9855b.filesusr.com/ugd/c711d8_02c89dee18fa45ffa21e2cb63ae59017.pdf?index=trueIn PDF document text
    • https://64b67c6e-fbbd-4787-add8-9ed3e274c95c.filesusr.com/ugd/eb6612_708f8f3fd5864f42a1fc1968ecfe8a4c.pdf?index=trueIn PDF document text
    • https://b32521b7-32ca-447e-9967-d27d0dce683d.filesusr.com/ugd/800b88_c6b5b157ea7747a18646cf2ed3a700ec.pdf?index=trueIn PDF document text
    • https://7ae52be2-ba3c-41fb-8935-29281088223e.filesusr.com/ugd/affaa6_f0276105f1c64a33a8e9e3615b1c8afa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mixanaz/funakibixetowutel.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/126039313.pdfIn PDF document text
    • http://babudenipovux.rf.gd/64403621418.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/lemusafatufamu.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e617.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE617 6208 bytes
SHA-256: 28b3a99e9e0f4b0480e651e5563e42f9328668592bbdc9b27a7eb2b52005563c
font_01_sfnt_off0000fb35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB35 10552 bytes
SHA-256: ad043360cacca2054b11611b4a584117817121c8aea299075d653c64ff2fcbee

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