Malicious PDF — malware analysis report

Static analysis result for SHA-256 57832bab5731adb5…

MALICIOUS

PDF

83.0 KB Created: 2021-04-14 20:07:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: fe96ea75761323b86d6b4d475a80b7e8 SHA-1: 598c72916fda3dd337fa850094e7c2b1c3eaeb8a SHA-256: 57832bab5731adb58101cef7b1aa719e97c15bf7c5ab51899d3fa42ff46dce88
96 Risk Score

Malware Insights

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

The file is a PDF that contains heuristics indicating an external URI and embedded URLs, with one primary URL being https://maypoin.ru/strik. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://maypoin.ru/strik?utm_term=law+of+cosines+practice+problems+pdf PDF link annotation
    • http://znakomstva18x.site/luvikikukovulkn08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455387/normal_6035e9a11bb07.pdfIn PDF document text
    • http://fewutame.getenjoyment.net/24_consonant_sounds_and_examples.pdfIn PDF document text
    • http://emmetrix.net/annabelle_2014_tamil_dubbed_full_movieymrus.pdfIn PDF document text
    • http://nuwevabufa.mypressonline.com/how_to_open_afterglow_ps3_controller.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387036/normal_6062a2c550a99.pdfIn PDF document text
    • http://myfoxing.online/keto_diet_recipes_for_beginnerschjx8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415045/normal_5fe193b1e88b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383165/normal_601a38613c14d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jagaxuvu.epizy.com/zigasukozepenekiradawajig.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/akuntansi_sebagai_bahasa_bisnis.pdfIn PDF document text
    • http://bofofopefolag.epizy.com/5th_grade_math_word_problems_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/why_is_my_amazon_fire_tablet_charging_so_slow.pdfIn PDF document text
    • http://zolivowubek.epizy.com/concentration_units_practice_problems_with_answers.pdfIn PDF document text
    • http://sivikonalijuto.myartsonline.com/mefepujibusijave.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/dark_wallpaper_for_android_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/69427569394.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/13499386736.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/australia_tourist_visa_form_from_india.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/77852660577.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/how_to_pair_my_bose_bluetooth_speaker.pdfIn PDF document text
    • http://zenakezogutomu.onlinewebshop.net/bsa_medical_form.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC88 5472 bytes
SHA-256: 3a4f709ec6331c5091814555d1e78c6a275440fff0172ce17b0dd64ed988b8eb
font_01_sfnt_off0000ff20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF20 12004 bytes
SHA-256: 6bef48004ffa23459b912e9093229c637d8a300164ef522594af1569dbcd1729
font_02_sfnt_off00012849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12849 16036 bytes
SHA-256: 9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940

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