Malicious PDF — malware analysis report

Static analysis result for SHA-256 5db2509ec682816e…

MALICIOUS

PDF

67.5 KB Created: 2021-05-14 01:47:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c925447e29791c55047a240ea87e98a8 SHA-1: efc4b4a8ed75e6af7d92d262a41143568abd3d9d SHA-256: 5db2509ec682816e715a3a05673d5ab05c3d4fd60076a4f19f0c476980aaf9c6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The embedded URL points to a domain that is likely hosting a malicious payload, disguised as a 'solutions manual'. The PDF structure itself contains an external URI pointing to this malicious domain, suggesting an attempt to exploit vulnerabilities or trick the user into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/strik?utm_term=solutions+manual+to+accompany+applied+mathematics+and+modeling+for+chemical+engineers+free+download
    • http://zumewidife.mygamesonline.org/soil_mechanics_and_foundations.pdf
    • http://mibemuxagegija.mywebcommunity.org/online_shopping_file_download.pdf
    • http://lg-supportteam.com/87565318965t1lvi.pdf
    • http://fakixigulidol.mywebcommunity.org/38703900449.pdf
    • http://pasadurasasagi.medianewsonline.com/lowoxezedudasametonosese.pdf
    • http://pornbustyvids.com/is_the_canon_powershot_sx540_a_good_camera_for_youtubedeztj.pdf
    • http://punejew.mygamesonline.org/99022988587.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wotidupodugi.myartsonline.com/81651037707.pdf
    • https://s3.amazonaws.com/gimisorixosu/solubility_curve_of_potassium_nitrate_lab_answers.pdf
    • https://s3.amazonaws.com/vinejivunitego/honeywell_electric_radiator_heater_reviews.pdf
    • https://s3.amazonaws.com/boduxatavepe/lorasadutivebe.pdf
    • https://s3.amazonaws.com/rudelazifizuvo/lajov.pdf
    • https://s3.amazonaws.com/vonutavekip/flyer_template_google_docs.pdf
    • http://kapowuxivi.atwebpages.com/grievance_letter_sample.pdf
    • http://tuvivitir.rf.gd/arcsoft_photostudio_5_manual.pdf
    • https://s3.amazonaws.com/jaloto/terraform_azure_kubernetes_version.pdf
    • http://sefeluxezilire.epizy.com/renewable_energy_systems_download.pdf
    • http://xurosuforudev.atwebpages.com/66785498019.pdf
    • https://s3.amazonaws.com/mesixadelomomo/inteligencias_multiples_en_ingles.pdf
    • https://s3.amazonaws.com/tinezedu/build_my_life_sheet_music_free.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_off0000c9c6.bin
17b2f046731da13b9bd68c7e6abd5c28b321e16a4b92783fd77e90a6ae290f84		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C6 5864 bytes
font_01_sfnt_off0000dda5.bin
33e73b7fdcc1ea28b9a66cda75cd9e71feabc94cb9fab03231db09e9a2513340		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA5 9956 bytes

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