Malicious PDF — malware analysis report

Static analysis result for SHA-256 56c28eb7cf542ef9…

MALICIOUS

PDF

73.4 KB Created: 2021-03-28 04:12:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e1b5bea4b6b3bdb9b5f9bd7a44cc740 SHA-1: 4cc275acdd362b3fecd55013b38945fcbb37c585 SHA-256: 56c28eb7cf542ef9f2c6da91c61a8a3472e0d0cf634c41e3558ce7ff5d47f2e4
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded URLs pointing to external domains, suggesting it's designed to redirect users to potentially harmful websites. The presence of PDF-specific heuristics further supports its classification as a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://golowaki.ru/wix?keyword=convergence+rate+of+inverse+quadratic+interpolation
    • https://cdn.sqhk.co/zejejofe/tjiWszR/16906656172.pdf
    • http://liberum.sportsontheweb.net/dream_theater_images_and_words.pdf
    • https://static.s123-cdn-static.com/uploads/4467036/normal_5fc596195cb7c.pdf
    • http://reduslim-italiaufficiale.site/takupukijuw.pdf
    • http://medilawibume.scienceontheweb.net/wojozorufuwopuvaxur.pdf
    • https://cdn.sqhk.co/bidekidarub/iarmghj/pegoxusafese.pdf
    • https://cdn.sqhk.co/tumowara/igxwjbm/mugujuzovotulelodufavox.pdf
    • https://cdn.sqhk.co/xisalaximel/GjdnjjU/selumutukumegewaweradex.pdf
    • https://cdn.sqhk.co/kokojisip/gY7kgia/funny_videos_of_wild_animals_talking.pdf
    • https://cdn-cms.f-static.net/uploads/4467577/normal_605a072c4320b.pdf
    • https://cdn-cms.f-static.net/uploads/4379969/normal_6014f5058641f.pdf
    • http://tedurelaseji.mygamesonline.org/mithun_rashi_name_list_gujarati_girl.pdf
    • http://pifanaliriwabo.mygamesonline.org/senior_business_analyst_interview_questions_and_answers.pdf
    • https://cdn-cms.f-static.net/uploads/4470408/normal_600fc7acb4ef5.pdf
    • http://it50save.info/ar_blue_clean_ar2n1_electric_pressure_washer_reviewfckuu.pdf
    • http://orbitan.fun/19276996183o62df.pdf
    • https://static.s123-cdn-static.com/uploads/4393632/normal_5feba12f8036b.pdf
    • https://cdn.sqhk.co/vevigagexoxa/7gimjeq/diversified_machine_9mm.pdf
    • https://cdn-cms.f-static.net/uploads/4473410/normal_6010f3185b0cf.pdf
    • https://cdn.sqhk.co/zimajigon/4ehbche/photo_puzzles_costco_canada.pdf
    • https://static.s123-cdn-static.com/uploads/4370785/normal_5ff9a5483b114.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000dff2.bin
ee0db85a77ce46540e4e7a1ce2da33959e3798e32f6e8261e425db73defbba94
pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF2 5416 bytes
font_01_sfnt_off0000f26f.bin
fbb3e3288dbd153274a76d8cf40e478e6529b40061539b658402e48e65d2cff5
pdf-font-stream PDF embedded font (sfnt) at offset 0xF26F 10816 bytes