Malicious PDF — malware analysis report

Static analysis result for SHA-256 38b858b326211975…

MALICIOUS

PDF

76.2 KB Created: 2021-03-19 09:41:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 260a3804119b583b1e674101c103dc03 SHA-1: 3aaabbeeb10e25b922f4f0626a30ba437e8ac3e0 SHA-256: 38b858b3262119751cd67d18c54fce5842997b18ccd4b1e98ade0f7f371c6691
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are to benign-looking PDF files, suggesting a link farm or SEO poisoning tactic. One of the primary external links, https://jacksth.ru/strik?utm_term=what+is+the+motif+in+oedipus+the+king, is suspicious and likely leads to a phishing or malware distribution site. The document's content and structure strongly indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/strik?utm_term=what+is+the+motif+in+oedipus+the+king
    • https://fovozipi.weebly.com/uploads/1/3/0/7/130775458/dudoj.pdf
    • https://murimuwisoruda.weebly.com/uploads/1/3/4/0/134017177/423c5.pdf
    • http://fudoviwil.mywebcommunity.org/3404395710.pdf
    • http://digogipexoluku.iblogger.org/12906787630.pdf
    • http://vokegitejupud.iblogger.org/gamizowugutiwunufoju.pdf
    • https://datulexajolibup.weebly.com/uploads/1/3/0/7/130738708/7243051.pdf
    • http://rijewomel.scienceontheweb.net/twilight_2008_full_movie_in_hindi_part_1_download_720p.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a0cb75f2-3b29-471a-bf81-23e1bde0604e/will_there_be_a_season_6_of_magicians_on_netflix.pdf
    • http://luxotenudiwuzu.rf.gd/aswamedham_telugu_movie_audio_songs_free.pdf
    • http://gorobibo.epizy.com/aspersor_manual_b_g.pdf
    • http://kibotiriponikew.rf.gd/3633439898.pdf
    • https://aabf49e0-5477-4fd2-8456-a986ef8f2a87.filesusr.com/ugd/9e14ca_63371139f921408e8ef3c4a0ca08c975.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d7c46abe-43a2-4cd1-8e35-c72ba4c26ad9/85399567726.pdf
    • https://uploads.strikinglycdn.com/files/f8a2730b-b038-4d3d-9338-b3db9e4f6432/difference_between_force_and_power_in_political_science.pdf
    • https://uploads.strikinglycdn.com/files/fb1fcf70-d711-4734-9747-63315f6c71d9/78265872786.pdf
    • http://lugifer.onlinewebshop.net/arnold_schwarzenegger_diet_plan.pdf
    • http://doretizuzalo.rf.gd/weight_gain_workout_plan.pdf
    • http://lusajafimaneru.myartsonline.com/simplification_of_algebraic_fractions.pdf
    • https://a001dc82-f31e-4944-9b76-0a8e602b6855.filesusr.com/ugd/e4ee87_028b701e97984746a3137b330d5133dc.pdf?index=true
    • 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_off0000eb6b.bin
d420492f6012fab6922800ee8c178350c26efafa311a16a88742f73771d9c199		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6B 5404 bytes
font_01_sfnt_off0000fdbd.bin
3ac3030c8af362076742595b142f6dd4d0e920d0b9e34828850725ef975be8ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBD 11036 bytes

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