Malicious PDF — malware analysis report

Static analysis result for SHA-256 860cb3d79e1d90f5…

MALICIOUS

PDF

94.4 KB Created: 2021-04-11 23:23:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 8e0aa1dd6e459531ada40f5f15546a89 SHA-1: 050d6d83329373bc4e387b8011f962c16ea9fdfb SHA-256: 860cb3d79e1d90f5672c265e570256609d2f8192e8a0b22d032fd50adc13a60e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically appearing as a search result for 'skyrim how to level smithing fast after patch 1.9'. This URL, 'https://soxebez.ru/strik?utm_term=skyrim+how+to+level+smithing+fast+after+patch+1.9', is flagged as malicious by ClamAV and ML classifiers, indicating a phishing or malware distribution attempt. The document's structure and the presence of many disposable domains suggest a link farm designed to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://soxebez.ru/strik?utm_term=skyrim+how+to+level+smithing+fast+after+patch+1.9 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369165/normal_5fca3c2f204dd.pdfIn PDF document text
    • http://pewekelexu.mygamesonline.org/54253202665.pdfIn PDF document text
    • http://niwizonoleror.mywebcommunity.org/52629800683.pdfIn PDF document text
    • https://cdn.sqhk.co/moxufupog/Xw0BjbD/dupiwuduwuxizekolad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366406/normal_605466722d1b4.pdfIn PDF document text
    • https://cdn.sqhk.co/kofelejezem/Bgdhbid/zombies_2_movie_songs_lyrics.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471230/normal_5fd94c53ed6a8.pdfIn PDF document text
    • http://nexipufogavajid.getenjoyment.net/normalcdf_vs_normalpdf.pdfIn PDF document text
    • https://cdn.sqhk.co/toromerepowa/fhiiV1s/snowball._io_ninja_location.pdfIn PDF document text
    • http://nakekizedexu.getenjoyment.net/60365166939.pdfIn PDF document text
    • https://wifovusu.weebly.com/uploads/1/3/4/3/134312249/0206c696ea434.pdfIn PDF document text
    • https://cdn.sqhk.co/lokijuzim/2giijib/roku_secret_channel_codes_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/nemisova/qijmmjj/46178933990.pdfIn PDF document text
    • http://merokomazojewi.scienceontheweb.net/24058829004.pdfIn PDF document text
    • https://rowexajezer.weebly.com/uploads/1/3/0/7/130776500/rajevajaluloresemuj.pdfIn PDF document text
    • https://sisilodoja.weebly.com/uploads/1/3/1/4/131406442/1384a37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374536/normal_600e114b803f6.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/hcgjhjw/train_simulator_pro_2018_mod_android_1.pdfIn PDF document text
    • http://vojemodipu.sportsontheweb.net/tipos_de_comunicacion_oral_dialogo.pdfIn PDF document text
    • https://cdn.sqhk.co/tosuwukiwate/hfq9ihi/slingshot_arrow_shooter.pdfIn PDF document text
    • https://minaraxu.weebly.com/uploads/1/3/4/7/134765114/7373010.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497650/normal_5fef14d5e0071.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://padusij.onlinewebshop.net/do_you_need_maths_to_study_business_management.pdfIn PDF document text
    • http://pavabiza.atwebpages.com/99639893500.pdfIn PDF document text
    • http://pozijawikubinun.myartsonline.com/matlab_plot_axis_range_auto.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012f8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F8E 6088 bytes
SHA-256: 8b64cf87898839b701853a2856ab52311d3ae8ebcddc25601ad29937256e4e0b
font_01_sfnt_off0001444d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1444D 11528 bytes
SHA-256: 2d586c9779159da1bbf1c0d98d4e6fdf5f4a99f2383f610981f665a8d7020fe8