Malicious PDF — malware analysis report

Static analysis result for SHA-256 d199b4505f9deb76…

MALICIOUS

PDF

80.3 KB Created: 2021-04-18 18:59:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0819f8d4166df6f45db0598fcb4fb959 SHA-1: 2bc326d9926f044ba0c587b26bfd4ec296868a95 SHA-256: d199b4505f9deb76dfa9229aa0804a1e2f2ed550b0a5d3828653d0c28124fe39
136 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 that likely serve as lures or download locations for malicious payloads. The heuristic 'SE_LOLBIN_RUN_COMMAND' suggests the document text may contain commands or references to executable content, further supporting a malicious document execution pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://jumiwimov.ru/strik?utm_term=xenyx+1202fx+usb
    • http://pakawuwujawo.getenjoyment.net/67408804653.pdf
    • http://fegivate.medianewsonline.com/holy_cancer_book_download.pdf
    • https://cdn.sqhk.co/riroxale/mXTjhhb/best_young_potential_players_fifa_20_career_mode.pdf
    • http://fanutoragozogow.sportsontheweb.net/caries_dentaires.pdf
    • https://cdn.sqhk.co/sidogorego/KtQchg1/taper_fade_curly_hair_black.pdf
    • https://cdn.sqhk.co/fajoliteve/6giEEfr/monkey_run_ithaca.pdf
    • https://cdn.sqhk.co/nevupediwix/hFgdkhc/57353730844.pdf
    • https://cdn.sqhk.co/siboxowimu/J0LhjAK/poboys_new_orleans.pdf
    • https://cdn.sqhk.co/xelalizogim/SphjbNY/nobulozewoxa.pdf
    • http://dizanixagegogin.iblogger.org/understand_marketing_information_system.pdf
    • https://cdn.sqhk.co/xugiwatokax/p3iVknm/fuxiwifibel.pdf
    • http://kobazugipodiv.medianewsonline.com/verbal_analogies_with_answers.pdf
    • https://cdn.sqhk.co/mevazasid/YdMhhjd/29206269772.pdf
    • https://cdn.sqhk.co/fajoliteve/6giEEfr/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/napejaxosinages/33813953969.pdf
    • http://tukejome.epizy.com/46214039988.pdf
    • https://s3.amazonaws.com/lomuper/wotlk_enhancement_shaman_pve_guide.pdf
    • https://s3.amazonaws.com/setigafat/kepaz.pdf
    • http://jijeledinevo.rf.gd/signing_naturally_units_7_12_answer_key.pdf
    • https://s3.amazonaws.com/geraromu/zawetudaliletud.pdf
    • https://s3.amazonaws.com/jevopemosod/winrar_archiver_free_latest_version.pdf
    • https://s3.amazonaws.com/sefukirexuwekij/hip_hop_albums_free.pdf
    • http://kukejisagev.epizy.com/guwumizulet.pdf
    • http://bijiwamosijiw.epizy.com/vuxazerebe.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_off0000ff55.bin
aa0bdf27d9a659f8155ce6a54136f3c9d34a93c21f70414aec0ffcb47c00f888		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF55 5036 bytes
font_01_sfnt_off000110a3.bin
139c02cbf90628b967274c80d55dc2674b58eadd3e4e6c5b6f6b029064e2a0b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110A3 10752 bytes

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