Malicious PDF — malware analysis report

Static analysis result for SHA-256 316a7df0043c6305…

MALICIOUS

PDF

79.7 KB Created: 2021-04-11 23:29:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f1a43fb46f13de58c5ff2395e467526 SHA-1: 71d10fef21454ca6db576b22b161f9095b81bd5e SHA-256: 316a7df0043c6305264e5f662b421d3f5650e0f6a1e9f4e1e14757c1e18ed9f3
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://kuzutuzo.ru/strik?utm_term=mitsubishi+eclipse+transmission+replacement+cost', suggesting a phishing or scam attempt to lure users to a compromised website. The document body, though heavily obfuscated, contains metadata related to car repair costs, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/strik?utm_term=mitsubishi+eclipse+transmission+replacement+cost
    • https://static.s123-cdn-static.com/uploads/4464311/normal_600209929e3ef.pdf
    • http://zowiramizowomo.iblogger.org/46380441578.pdf
    • https://petozuxelilaf.weebly.com/uploads/1/3/4/2/134265439/gonepoxumexile_fepubuvasada_ludose_zemif.pdf
    • https://xuvuluvibes.weebly.com/uploads/1/3/4/4/134494650/ff4dac.pdf
    • https://cdn-cms.f-static.net/uploads/4369520/normal_6049b33370438.pdf
    • http://yoganchik.space/total_overdose_apk_file_downloadv9or4.pdf
    • http://buybritishcat.com/21476784658fywp0.pdf
    • https://komimarokobak.weebly.com/uploads/1/3/4/6/134604519/wifogenedom.pdf
    • http://zavarivaemvmeste.ru/australian_groundwater_modelling_guidelinese23yr.pdf
    • https://static.s123-cdn-static.com/uploads/4413361/normal_5fecd53c9f4eb.pdf
    • http://kungfumalibu.com/dungeons_and_dragons_5e_guidezm4w5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kewuxejikiwe/manually_adding_addons_wow.pdf
    • https://uploads.strikinglycdn.com/files/2859271f-f814-41a2-8670-f4812aac3843/godafaxogupefi.pdf
    • https://uploads.strikinglycdn.com/files/a521ce9b-3614-434e-80dc-c99a97c56a38/how_to_assemble_vicks_starry_night_humidifier.pdf
    • https://uploads.strikinglycdn.com/files/55c1bbf5-bb51-4168-b4aa-05f18e1dff1a/how_to_build_mental_toughness_for_running.pdf
    • http://finabijilovob.rf.gd/athens_transport_map.pdf
    • https://s3.amazonaws.com/vibuvomomuv/osrs_varrock_diary_guide.pdf
    • http://zelimuperuna.rf.gd/nakasanosawok.pdf
    • http://xamudakosenezi.rf.gd/ayan_1080p_hd_video_songs_free.pdf
    • https://uploads.strikinglycdn.com/files/6b20f8f7-3e23-4fa6-acd5-d8f46d917045/what_is_dark_souls_3_the_fire_fades_edition.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9fb.bin
23d816b93f385020473cba41cb4a88cfadab14f140be3273de60d5a77dc43fa6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FB 5316 bytes
font_01_sfnt_off00010bec.bin
87e3a3c826d2712b786fad451a5f897f4325734a77d8cd8b8225b0589e6078d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BEC 10928 bytes