Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee48e0559ed960ed…

MALICIOUS

PDF

80.6 KB Created: 2021-03-22 08:41:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 22b74ce24ba22f21b4c3c701099aefab SHA-1: b272cb6bfee51cee9065c551fb00895a3ef9daf9 SHA-256: ee48e0559ed960eddfa5e63a0c71756be4c2709c16f84df4157057c1c6ee314d
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one specifically pointing to `https://midufefew.ru/award?keyword=basic+knowledge+of+internet+and+networking+pdf`, suggesting a phishing or malware distribution lure. The document body, though heavily obfuscated, contains metadata related to PDF generation, and the presence of multiple external URIs indicates an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/award?keyword=basic+knowledge+of+internet+and+networking+pdf PDF link annotation
    • http://fotubobuwenapu.scienceontheweb.net/how_to_update_nexus_10_manually.pdfIn PDF document text
    • http://prestige-air.space/bahubali_the_game_hack_mod_apk_free_download8ph7q.pdfIn PDF document text
    • http://copyrightproblem.com/five_nights_at_freddys_free_download_pc_full_versionq1me6.pdfIn PDF document text
    • http://igonlinesupport.com/banutenowajipumjsyb8.pdfIn PDF document text
    • http://moxilekulina.getenjoyment.net/97302386523.pdfIn PDF document text
    • https://cdn.sqhk.co/susopavazane/gM1Y4pe/96551926556.pdfIn PDF document text
    • http://qrastenmap.online/68315932490igjoy.pdfIn PDF document text
    • http://ins.expert/c_r_p_f_full_form_2019rcawh.pdfIn PDF document text
    • http://javaxirivibewi.mygamesonline.org/movizujoju.pdfIn PDF document text
    • https://cdn.sqhk.co/purawewus/jfe39gh/terranova_church_vbs.pdfIn PDF document text
    • https://cdn.sqhk.co/gapekozuwa/fsijGPL/teacher_appreciation_gift_ideas_during_covid.pdfIn PDF document text
    • http://farunoraxukiz.getenjoyment.net/how_to_make_my_screen_smaller_on_mac.pdfIn PDF document text
    • http://bukudix.getenjoyment.net/abituriyent_jurnali_2020_kecid_ballari_yukle.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/the_sparrow_book_ending.pdfIn PDF document text
    • http://pasetbs.xyz/download_bomber_friends_mod_apk_2019al99c.pdfIn PDF document text
    • https://cdn.sqhk.co/bijozugetav/O4jc3aY/bypass_pin_lock_screen_android.pdfIn PDF document text
    • http://hugertely.xyz/programmable_logic_controllers_petruzella_4th_edition_solutionsfptbl.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/2fjdugc/candomble_religion.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://720c7b34-a033-4bf0-83ea-6be17de98aa2.filesusr.com/ugd/03ef8e_4d3036ed30b24955b2c195dfded69563.pdf?index=trueIn PDF document text
    • https://b962d5b8-8819-42e3-9ba3-d95e8366760e.filesusr.com/ugd/f51585_047c36a9cfe64c1094e0755aa72fc398.pdf?index=trueIn PDF document text
    • http://ruzakema.onlinewebshop.net/modern_chemistry_textbook_answers_chapter_8.pdfIn PDF document text
    • https://93dbb2ad-f1e8-4c6c-adfd-2ef134399473.filesusr.com/ugd/df4650_4d1123024fd24a72985f75d550cbd4f9.pdf?index=trueIn PDF document text
    • https://c8070bf9-ed42-4c5d-8eb8-ca35ee70f136.filesusr.com/ugd/d38238_523e65b90b7b4d86ad6146efe7ac82b4.pdf?index=trueIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB48 5528 bytes
SHA-256: a6bde0ee08e7b84fe5ba74e353ff1fce26df4b8a9e99532604657d06583e3c6f
font_01_sfnt_off00010e42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E42 11232 bytes
SHA-256: f837ff74dc9353b19f182c4d790acdcadc0cab25848d3d994a17ea116c3549f7