Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b99430de00c4bb8…

MALICIOUS

PDF

83.8 KB Created: 2021-04-18 19:24:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 732a76ebcbc5b446e6123c0f8817312a SHA-1: b67a01d2cf0767c071b4876827254fc1dc61e976 SHA-256: 5b99430de00c4bb879cfc8ba89997fcfc0c886d29b430a9ff1a1d4b55f33e0f3
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, appears to be a lure related to financial topics, aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://pelibifir.ru/strik?utm_term=what+is+free+cash+flow+of+a+company
    • http://letaraluzim.scienceontheweb.net/fabazubep.pdf
    • https://cdn.sqhk.co/novozefox/jcryhcU/download_toca_hair_salon_4_mod.pdf
    • http://ligumexijigab.getenjoyment.net/advantages_of_globalization_on_education.pdf
    • https://cdn.sqhk.co/rawavuzom/PyRhgeJ/funskool_mastermind_game_how_to_play.pdf
    • https://cdn-cms.f-static.net/uploads/4370063/normal_6049535626121.pdf
    • http://pigigozoruda.mypressonline.com/letter_of_appointment_format.pdf
    • https://cdn.sqhk.co/zejizoguzut/jaiHiis/exploration_craft_mod_apk_gems.pdf
    • https://cdn.sqhk.co/vemudumuxixu/eLhgjk0/37056342936.pdf
    • https://cdn.sqhk.co/xaselavub/iijifia/gowululumipusodomuvonan.pdf
    • https://static.s123-cdn-static.com/uploads/4460983/normal_5fc8dec938609.pdf
    • https://static.s123-cdn-static.com/uploads/4388160/normal_5fff188039fef.pdf
    • http://kotudekudoges.getenjoyment.net/somovajevogerene.pdf
    • https://cdn-cms.f-static.net/uploads/4483081/normal_5fe99bcb3fbe1.pdf
    • http://jakusavu.sportsontheweb.net/centroide_calculo_integral.pdf
    • https://cdn.sqhk.co/vewukiziwemi/Bibgc4i/jisefolelivozupodil.pdf
    • https://cdn.sqhk.co/getabemuto/aYjjJYC/jolezepagu.pdf
    • http://kufowawixapiva.sportsontheweb.net/vocabulary_advanced_cambridge.pdf
    • http://pubomotikevetu.22web.org/fafekopovilagobuxaxewob.pdf
    • http://nakijeku.mygamesonline.org/boolean_algebra_simplification_exercises.pdf
    • https://cdn.sqhk.co/sowojusawepu/ichbchh/67644002181.pdf
    • https://cdn-cms.f-static.net/uploads/4409813/normal_606682e1cf983.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://luwegovufa.epizy.com/m._a_pass_2017_full_movie.pdf
    • http://xezigogologivam.rf.gd/zoruvosikasifaniju.pdf
    • http://vivijar.epizy.com/panasonic_av_hlc100.pdf
    • http://pasifowon.atwebpages.com/examples_of_learning_objectives.pdf
    • http://pexofapu.myartsonline.com/chamomile_medicinal_uses.pdf
    • http://lujolugajejizog.epizy.com/46957639108.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_off00010824.bin
34911117875f49a77a3151b2e645fc381e2519ff798fc80f337c5c7f83e2b851		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10824 5460 bytes
font_01_sfnt_off00011aab.bin
6c3c512120c1854cecd95b57d7510a25aff164e08268499da7ec9aa24ab75eed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AAB 11332 bytes

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