Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c0e2eb641a6978f…

MALICIOUS

PDF

95.2 KB Created: 2021-03-25 12:41:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 928a9779fe28758560601a402fb422c9 SHA-1: ced23c9db8895a40620505a80ca760aee53d7f5d SHA-256: 4c0e2eb641a6978f22bf99e13f8d0d798f42f56ae1c4394db868009fedf4c8ee
214 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, many of which point to potentially malicious or unknown domains, suggesting a link farm or phishing attempt. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags a URL leading to dafemum.ru, indicating a redirector to malicious infrastructure. The document body, though heavily obfuscated, contains keywords related to the embedded links, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/award?keyword=four+branches+of+philosophy+pdf In PDF document text
    • http://ropufogesuzazeg.iblogger.org/70322102682.pdfIn PDF document text
    • http://wisemad.22web.org/37221009505.pdfIn PDF document text
    • https://cdn.sqhk.co/dazulegug/iajfUV0/nenupejurebapogorubawu.pdfIn PDF document text
    • http://nepifumawal.22web.org/biodata_format_for_muslim_marriage_free_download.pdfIn PDF document text
    • http://malespw.xyz/mibunobubafs37ep.pdfIn PDF document text
    • http://sberbank.services/spring_mvc_tutorialspointgforc.pdfIn PDF document text
    • https://cdn.sqhk.co/murofoli/ienibib/university_of_montana_bookstore.pdfIn PDF document text
    • https://cdn.sqhk.co/mekaxosur/ilgcgcx/demonubitubasoxe.pdfIn PDF document text
    • https://cdn.sqhk.co/nugopanage/f3gjwij/beat_the_boss_3_17_apk.pdfIn PDF document text
    • http://foyou.store/inheritance_eragon_summaryyadd5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jeromisixinolib/geometry_worksheet_1._1.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/asura_s_wrath_pc_ita.pdfIn PDF document text
    • https://8717ace1-8174-44a1-9f98-e7cbf9e9ed94.filesusr.com/ugd/14e3be_bfe80891bb1a4d9da09fde9085a07f7a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/vavetozumapokokarepofonag.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/lg_cd_rom_driver_free.pdfIn PDF document text
    • https://9849c7ec-8b19-4b81-9a64-db2537ea7c40.filesusr.com/ugd/97b1c0_0673797fffb94d4eadb6cc32d50436dd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fatisake/what_is_the_theme_of_war_and_peace.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/spotify_cracked_android.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/mojelekobavufujof.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/exponents_practice_challenging_problems_answer_key.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_off00012fc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC5 5440 bytes
SHA-256: 3e91bc65a20d9d0fa55a30975d110400766514c797c4d5417d238966ba01f228
font_01_sfnt_off00014242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14242 13836 bytes
SHA-256: 1920741f8769e5a05f32cff0aabde992e0620163ec8a6ceabf30bf53cc32f44c

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