Malicious PDF — malware analysis report

Static analysis result for SHA-256 13b6618064ffeca2…

MALICIOUS

PDF

73.1 KB Created: 2021-02-20 05:50:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d9d0babeb8f40ffefa81220e2c732cd3 SHA-1: 493a37dd15de35c048b3922690c9e84584306037 SHA-256: 13b6618064ffeca2aee011d1a326758bec2770eb59f58e293b4c3b34838703ae
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious intent. It contains numerous external URIs and is identified as a link farm hosted on disposable domains, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the nature of the link farm indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/123?utm_term=powerful+female+warrior+names PDF link annotation
    • http://com-signto5.xyz/foloxikulosojetugezuwufi6x8mt.pdfIn PDF document text
    • https://dazutexigamufo.weebly.com/uploads/1/3/2/7/132740900/7074751.pdfIn PDF document text
    • http://espaceclient-cmb.com/android_studio_block_comment_shortcuthcj9v.pdfIn PDF document text
    • http://webpost.pro/bnz_kiwisaver_performance0ltn5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467912/normal_5ffb8280bf71c.pdfIn PDF document text
    • https://cdn.sqhk.co/lituxopevuk/ygjfhfG/open_world_games_best_steam.pdfIn PDF document text
    • https://losulojer.weebly.com/uploads/1/3/0/7/130739206/zotazamelelapo_lozofodemama.pdfIn PDF document text
    • https://razitesewiwi.weebly.com/uploads/1/3/2/8/132815022/9417327.pdfIn PDF document text
    • http://ins.expert/wobujilleejw.pdfIn PDF document text
    • https://lezanaxowap.weebly.com/uploads/1/3/2/6/132696506/5c76e1a.pdfIn PDF document text
    • http://idealica-official-it.website/monster_hunter_world_ancient_forest_battle_themeaav4f.pdfIn PDF document text
    • https://xikunozazoteta.weebly.com/uploads/1/3/1/4/131453294/subademixizome-gabujevu-busoxutovidu-wuvuzoto.pdfIn PDF document text
    • https://cdn.sqhk.co/pigajifaw/zNmTia8/nojizobek.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479710/normal_5ffebb4862298.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/ben_gurion_flight_departure_information.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_off0000e23e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE23E 5004 bytes
SHA-256: 780e9058fe16710d9d6b23e8a85cd5d28467279f213c0b3886ae012a8e029171
font_01_sfnt_off0000f338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF338 10764 bytes
SHA-256: 190fd985d57e1bb8aacd6505254d1c10b28a9877bbc34b264d582988147bb84e

Open this report in the interactive analyzer, or submit your own file for analysis.