Malicious PDF — malware analysis report

Static analysis result for SHA-256 fba9e126ee618d31…

MALICIOUS

PDF

77.0 KB Created: 2021-03-15 18:05:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 956c7a07dd9f8a332dc0182a1f3379b0 SHA-1: a31b72c3ccf6ddd70633268a68a3e8b8c8a42784 SHA-256: fba9e126ee618d3104665bffc859d7d9a4546648f6526937dc3bd4267a4bc106
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The embedded content appears to be obfuscated, but the presence of numerous external URLs strongly suggests the primary purpose is to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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 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.
  • 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://soxebez.ru/wix?keyword=stagger+lee+lyrics+taj+mahal PDF link annotation
    • https://gibetixogi.weebly.com/uploads/1/3/1/6/131636946/495a2e5cb3858cb.pdfIn PDF document text
    • https://fezowekufeda.weebly.com/uploads/1/3/3/9/133999429/5977610.pdfIn PDF document text
    • https://cdn.sqhk.co/lomasamube/fjaidjg/nerifufebabaru.pdfIn PDF document text
    • https://vijibasotaxeja.weebly.com/uploads/1/3/5/9/135990507/jozufigujimororonedu.pdfIn PDF document text
    • https://cdn.sqhk.co/lewikokezina/hjFliin/wubokimagefugenabinegeso.pdfIn PDF document text
    • https://zebakikalelu.weebly.com/uploads/1/3/0/7/130775248/9054127.pdfIn PDF document text
    • https://genebametujo.weebly.com/uploads/1/3/4/9/134904617/derafuwiwug_rowapodanujo.pdfIn PDF document text
    • https://cdn.sqhk.co/gevopobi/ggjegeo/pibitejudejumejinipadebuj.pdfIn PDF document text
    • https://cdn.sqhk.co/pumopivosoba/hdE6ogi/wifi_drivers_for_windows_10_download.pdfIn PDF document text
    • https://cdn.sqhk.co/fefamuve/qOl0ggJ/ultimate_epic_battle_simulator_game_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413109/normal_5fd3a4e244c40.pdfIn PDF document text
    • http://tikonazab.iblogger.org/dd_character_sheet_5e_editable.pdfIn PDF document text
    • https://cdn.sqhk.co/jigugabopu/pifLwq4/tipifiminoxoj.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/jgejsid/59234447177.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378613/normal_5fdba5ccb2d6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451047/normal_6019be8f0f67e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zodabozaloti.rf.gd/70366335412.pdfIn PDF document text
    • http://jezowadu.epizy.com/42867684385.pdfIn PDF document text
    • http://zelalosiker.rf.gd/30109457172.pdfIn PDF document text
    • http://domusas.rf.gd/dd_3.5_templates_list.pdfIn PDF document text
    • http://rumalitufe.rf.gd/ruluvum.pdfIn PDF document text
    • http://rupegofiminatef.epizy.com/3677540614.pdfIn PDF document text
    • http://jinisobijeg.rf.gd/microbiology_flash_cards_free_download.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_off0000ed94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED94 5496 bytes
SHA-256: f703c49e435e2bcc72751e82a46e8460ebcee78d1612bab2e975cde2d88240b2
font_01_sfnt_off00010026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10026 11240 bytes
SHA-256: 0344724b175dc966215e0f1bb16854142ae3a090742ad4bd7241e596a9147f98

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