Malicious PDF — malware analysis report

Static analysis result for SHA-256 f36ae1b350b51569…

MALICIOUS

PDF

87.9 KB Created: 2021-05-16 15:02:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1032d55c6a3f6e76328da7999afc314c SHA-1: 29c5d9f5d39b8e7bc577b42d90ced3ed525b299b SHA-256: f36ae1b350b51569527a331ba4c7eb0f01aae674dc2db14dd6927df55731572a
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further confirm its malicious nature. The document body, though heavily obfuscated, appears to be a lure related to a technical query, suggesting a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://xezojetit.ru/strik?utm_term=how+do+i+program+my+honeywell+5000+thermostat
    • https://cdn-cms.f-static.net/uploads/4470232/normal_5fe9d81f4dff0.pdf
    • https://cdn-cms.f-static.net/uploads/4458390/normal_60504c94cd29a.pdf
    • https://cdn-cms.f-static.net/uploads/4471114/normal_5fe84af7dffe0.pdf
    • http://taxokijoba.sportsontheweb.net/what_was_the_purpose_of_the_pyramids_brainly.pdf
    • https://static.s123-cdn-static.com/uploads/4377909/normal_5ffe9417ba21c.pdf
    • https://static.s123-cdn-static.com/uploads/4446770/normal_5ff031555c4bd.pdf
    • http://gajaxujifusokul.mygamesonline.org/panasonic_viera_50_inch_plasma_tv_weight.pdf
    • https://static.s123-cdn-static.com/uploads/4416939/normal_5fdebe5f77e93.pdf
    • https://cdn-cms.f-static.net/uploads/4465136/normal_601336d7976c8.pdf
    • https://static.s123-cdn-static.com/uploads/4366661/normal_5fe17459364f1.pdf
    • http://wamipivifubape.sportsontheweb.net/arabic_adjectives_list.pdf
    • https://cdn-cms.f-static.net/uploads/4380080/normal_602f4bc0b75c7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/bifadiwuwileji/lidubepomuvanere.pdf
    • http://bogalibamadom.myartsonline.com/basel_2_risk_parameters.pdf
    • https://s3.amazonaws.com/kewakuko/abbyy_lingvo_android.pdf
    • https://s3.amazonaws.com/bupaxomu/direct_indirect_variation_worksheet.pdf
    • https://s3.amazonaws.com/nokiva/15800861232.pdf
    • https://uploads.strikinglycdn.com/files/4f934355-835a-4924-a88d-7428897748a9/facebook.com_acebook_log_in.pdf
    • https://s3.amazonaws.com/tevigotu/26057359012.pdf
    • https://s3.amazonaws.com/sojaxub/20383964076.pdf
    • https://s3.amazonaws.com/gulapore/best_free_audio_recording_software_windows.pdf
    • https://s3.amazonaws.com/musoxifuvitalo/factory_reset_android_using_pc_software.pdf
    • https://s3.amazonaws.com/patotale/xosanulikavose.pdf
    • https://s3.amazonaws.com/fedufiporara/houghton_mifflin_6th_grade_math_answer_key.pdf
    • http://zuzopejorexa.onlinewebshop.net/sanunozez.pdf
    • https://uploads.strikinglycdn.com/files/f3c4a12b-e47f-41ce-876d-d6340dd72172/nejexebed.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010aa4.bin
6d27d852cd53a48210e98b61e0619b773a26cfe2551bbf380bdd49e992e2ba4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA4 5580 bytes
font_01_sfnt_off00011d8e.bin
678f4601519a5c75f266f3eec3afbfff93444bbb0034761b7f334c7536d332d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D8E 11148 bytes
font_02_sfnt_off00014376.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14376 4324 bytes

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