Malicious PDF — malware analysis report

Static analysis result for SHA-256 5081ec9f056c72f2…

MALICIOUS

PDF

84.2 KB Created: 2021-06-03 16:13:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61d862d6c47de7b39e195eb3e931558f SHA-1: 80694b33b8912b506a7cda52c64c913823168c08 SHA-256: 5081ec9f056c72f229daad84c05768746a969ace773ae27a34425fbdb9107b7f
96 Risk Score

Malware Insights

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

The PDF file contains a lure related to 'how to turn a tuff shed into a tiny house' and embeds a URL pointing to 'cructi.ru'. This URL is likely used to deliver a malicious payload or redirect the user to a phishing site. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://cructi.ru/pbw?utm_term=how+to+turn+a+tuff+shed+into+a+tiny+house
    • https://cdn-cms.f-static.net/uploads/4461250/normal_60252652916f2.pdf
    • https://cdn-cms.f-static.net/uploads/4384296/normal_601146f4d8ae9.pdf
    • https://cdn-cms.f-static.net/uploads/4486353/normal_606ddc23bf724.pdf
    • https://cdn-cms.f-static.net/uploads/4407756/normal_601bfb1658ea0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gamaxidad.pbworks.com/f/dofometezurig.pdf
    • https://uploads.strikinglycdn.com/files/07519c31-c40f-498d-99ea-7cbf63c67110/20463688566.pdf
    • https://uploads.strikinglycdn.com/files/09ce7afb-ab62-4714-a514-b51fc2408b6e/life_fitness_elliptical_x1_power_cord.pdf
    • http://damopijos.pbworks.com/f/zuwekam.pdf
    • https://uploads.strikinglycdn.com/files/c42308b6-e4d7-4b2f-9185-106469c7642d/vuzizovusebaz.pdf
    • http://pebokuvog.pbworks.com/f/94025005505.pdf
    • http://visetululiv.pbworks.com/w/file/fetch/144413772/cheat_engine_ios_13_no_jailbreak_free.pdf
    • http://fisukafetif.pbworks.com/w/file/fetch/144424911/pandas_get_one_column_as_dataframe.pdf
    • http://tarogifere.pbworks.com/f/student_desmos_tile_pile_answer_key.pdf
    • https://uploads.strikinglycdn.com/files/de035b7c-9a8d-4245-aadc-4576834b7945/34142049560.pdf
    • https://uploads.strikinglycdn.com/files/98c07f17-ee17-4abb-bb07-42e46e03c782/swann_camera_system_best_buy.pdf
    • http://noxiwako.pbworks.com/f/nixufebinufoju.pdf
    • https://uploads.strikinglycdn.com/files/16aac2cf-2009-4aae-a94a-d1e455ab3aa7/food_combining_chart_for_gerd.pdf
    • https://uploads.strikinglycdn.com/files/f4075564-e340-4c75-8b72-b1c5d8329088/lean_business_plan_template_google_docs.pdf
    • http://doxawadar.pbworks.com/f/super_mario_64_hd_android_download_apk.pdf
    • http://pefagisunel.pbworks.com/w/file/fetch/144485988/lautre_valse_damlie_piano_sheet_music.pdf
    • http://memofemovo.pbworks.com/f/gedivizexaz.pdf
    • http://zabodovojif.pbworks.com/w/file/fetch/144426162/lukeref.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000113a1.bin
40cade43ef66241a4682f35724178a9ff81c46d2d7c2decafad00100daea3920
pdf-font-stream PDF embedded font (sfnt) at offset 0x113A1 5120 bytes
font_01_sfnt_off0001251c.bin
09b55309dec5362ccf56d9afb63f8a2e05a9145524e49ccbc196b5421c0aa3c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1251C 10932 bytes