Malicious PDF — malware analysis report

Static analysis result for SHA-256 69f228217abdf4fb…

MALICIOUS

PDF

163.1 KB Created: 2021-03-24 13:31:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e44f7e26898ea3b23b925eead7be0fe9 SHA-1: 421edba8c01316c9ffb7dcccd049be448169876e SHA-256: 69f228217abdf4fbe3fd7827ff9a765ce51751ef08027d93df12dc6e1f2be494
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and known malicious redirectors. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure for users to click on these links, likely leading to phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 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.
  • 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=la+cabala+el+conocimiento+completo+pdf In PDF document text
    • http://bupetud.xyz/sizakopepmdxm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426267/normal_5fe78a2eebc7e.pdfIn PDF document text
    • http://saxobupazes.sportsontheweb.net/57295888032.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452834/normal_6043595e756de.pdfIn PDF document text
    • http://afterdealer.pro/6979316151kdpz2.pdfIn PDF document text
    • http://italylife.pro/addict_with_a_pen_piano_sheet_musicc1wdm.pdfIn PDF document text
    • http://simultaneously.space/organizational_behavior_and_human_resource_management2mn5i.pdfIn PDF document text
    • http://vodabutopidaru.getenjoyment.net/certificate_of_residence_thailand.pdfIn PDF document text
    • http://gelupulofevabek.medianewsonline.com/21795613293.pdfIn PDF document text
    • http://my-favshopg.online/hot_chamber_die_casting_process7k0wp.pdfIn PDF document text
    • http://lipexifinidoda.scienceontheweb.net/fepake.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415769/normal_601ff17369dd6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rupegofiminatef.epizy.com/medical_transcription_pathology_report_sample.pdfIn PDF document text
    • https://3f9320ff-391d-49df-b192-c557e211a93c.filesusr.com/ugd/469aea_4d9d3f8dda4640b08cc395ca9a49718f.pdf?index=trueIn PDF document text
    • http://nutimuratibuzur.epizy.com/como_blanquear_el_ano_de_forma_natural.pdfIn PDF document text
    • https://58eafb2e-ea74-4523-a1b2-d2e0fe9bfe54.filesusr.com/ugd/466fa0_4f7f7f669aaa45ca81e18d5b7667a32a.pdf?index=trueIn PDF document text
    • http://zikedigux.rf.gd/our_world_phonics_1_download.pdfIn PDF document text
    • http://nuzoniwetavo.rf.gd/bim_360_docs_user_guide.pdfIn PDF document text
    • https://15e12281-0fef-4bb1-b284-2b61ddec1698.filesusr.com/ugd/6c5390_05113e0b306b448caab2442305b6889a.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00022ea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22EA6 5108 bytes
SHA-256: 47916c3288982676a7a952ec0762be7504bd2260a4a1d88e6af18f5e2bd303a3
font_01_sfnt_off00023ff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23FF6 13436 bytes
SHA-256: db57984d2294d54696aac32fac336937227b36e4e5e6f19d5baf2544256f77c8
font_02_sfnt_off00026974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26974 16060 bytes
SHA-256: 4ef9506ee11a349461550e6b437e3786686b598308a87786035880d16624999d

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