Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9a59cb8e85d9186…

MALICIOUS

PDF

81.9 KB Created: 2021-03-22 08:26:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2ac68354a9a1cc11560cf41d0cc58782 SHA-1: ad8bee2b58acab5c982d97814ebf597aa430da3f SHA-256: e9a59cb8e85d91861cbde3237281faf32729ac576d71441c443ea60a8fd624db
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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.
  • 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://lozipotod.ru/award?keyword=coca+cola+philippines+case+study+pdf PDF link annotation
    • https://cdn.sqhk.co/zodenizekija/ggghlgd/detention_officer_jobs_in_texas.pdfIn PDF document text
    • https://cdn.sqhk.co/luwokiseg/hia2ehi/93314951777.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464871/normal_5ff812d2e9d3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446645/normal_5fea173a63230.pdfIn PDF document text
    • https://cdn.sqhk.co/fipexuwebo/iagdLhh/cisco_firepower_threat_defense_user_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365601/normal_5fce9757ab66a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453327/normal_601ac4c91ea9b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nosirewelavof.epizy.com/how_to_do_rational_inequalities.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/mumonoto.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/sekupugivowutusu.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/ambareesha_kannada_movie_hd.pdfIn PDF document text
    • http://zuwolum.rf.gd/cardboard_sheet_design.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/leytonstone_high_school_ofsted_report.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/gavijakuve.pdfIn PDF document text
    • https://c0b8f06b-4e98-4d3d-89ef-2f08caba629a.filesusr.com/ugd/0c8cc8_7b1cb28f2ad44c3398126f9cfa7f9b15.pdf?index=trueIn PDF document text
    • http://petirepure.epizy.com/bohemian_rhapsody_piano_sheet_easy.pdfIn PDF document text
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_85ef644d3980448fb087f93ad68a0c9b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rimepusox/89820512490.pdfIn PDF document text
    • https://6997f972-013f-4c6f-ac95-4179ba17a557.filesusr.com/ugd/549e1a_5d837aac945f4131bc2d58f12d408b5c.pdf?index=trueIn PDF document text
    • https://d4180a97-8dd0-4bf1-9e2f-d1b128d1a64d.filesusr.com/ugd/ae059d_cb8cb23f93ca45858802169fcc3f110b.pdf?index=trueIn PDF document text
    • http://sebosolusid.rf.gd/biotransformation_of_pesticides.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/danezobowetonixijaf.pdfIn PDF document text
    • http://wuxokap.rf.gd/sample_tv_show_treatment.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/acer_aspire_v5-571_ms2361_touch_screen_replacement.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B1 5156 bytes
SHA-256: 9a9883e9bea01f71efcf79c352ef6096650c220bde4953f18a9debfc00d4a574
font_01_sfnt_off00010634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10634 11092 bytes
SHA-256: 023e72462a29a777fa5a301bc97a8bd42c29c19946b60a176ba66591bea05e52
font_02_sfnt_off00012bde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BDE 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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