Malicious PDF — malware analysis report

Static analysis result for SHA-256 1925e02f24be2cdc…

MALICIOUS

PDF

77.4 KB Created: 2021-03-29 07:49:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 698bac83c7cef452d2f76795306ef89f SHA-1: b2d88498c03e6495b6fb87e116aff1bb82d157e0 SHA-256: 1925e02f24be2cdcbf1669f4396ddf3224229f9c63c1b316617d748bd396fe14
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to suspicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The document body, though heavily obfuscated, contains references to 'Kelley blue book value cars canada', suggesting a lure to trick users into clicking on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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-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://kuzutuzo.ru/strik?utm_term=kelley+blue+book+value+cars+canada
    • http://zoomita.space/annamacharya_tamil_film_songs_freesyi7f.pdf
    • https://biparobotimipus.weebly.com/uploads/1/3/4/4/134498468/rododo-gosipi.pdf
    • http://smcjd.com/betrayal_at_house_on_the_hill_expansionbd2hn.pdf
    • https://ropifupagefe.weebly.com/uploads/1/3/4/5/134584424/ece6de.pdf
    • http://agreevudb.rest/mad_gunz_shooting_games_online_battle_royales84mg.pdf
    • https://petovowatudero.weebly.com/uploads/1/3/1/6/131606592/zijijubatufeweb.pdf
    • http://italonewsero.site/31437506641i002j.pdf
    • https://motadonikedubi.weebly.com/uploads/1/3/1/8/131856170/gimen_davaw_tazipafakip.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://02664c88-84e5-42fa-aae3-682d3a0d4328.filesusr.com/ugd/39d081_39bec20f18934d1a9e0524f9ad6a1bd5.pdf?index=true
    • https://s3.amazonaws.com/fadupazageraf/demonstrative_pronouns_grade_2_worksheet.pdf
    • https://s3.amazonaws.com/sizadagazagaj/the_maze_runner_series_movie_order.pdf
    • https://s3.amazonaws.com/luworizesupox/hp_laserjet_pro_400_color_printer_m451nw_specs.pdf
    • https://s3.amazonaws.com/neporezofov/ruwaworuk.pdf
    • https://0621cc9e-6449-4e8a-a8bd-baee9ad62a2c.filesusr.com/ugd/affb4a_69d3e8f2574a4a45a4914525e5da01a5.pdf?index=true
    • http://wonavoka.epizy.com/how_to_calculate_flow_rate_in_a_pipe_from_pressure.pdf
    • https://cb47f074-0476-4434-b381-5672a365cab8.filesusr.com/ugd/c46c8a_3a033506f1414dfa9579725e498448ad.pdf?index=true
    • https://s3.amazonaws.com/sinadi/java_8_features.pdf
    • https://bd15da75-ee01-4ad3-8b22-4778d9929f37.filesusr.com/ugd/1abc29_2cae37e08ce74508a943c1747ef9eba4.pdf?index=true
    • https://s3.amazonaws.com/vuliwisuwig/formal_hairstyles_for_natural_african_american_hair.pdf
    • https://s3.amazonaws.com/feseni/super_bomberman_r_update_2._2_pc.pdf
    • https://d0fd53c2-66a5-49f7-a942-a4bfc50892a3.filesusr.com/ugd/11baf9_a21b2842ffd54811a59e9176e7439521.pdf?index=true
    • http://povagemu.rf.gd/android_auto_aa_mirror_2019.pdf
    • https://s3.amazonaws.com/zarevizebi/54657529415.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_off0000f21a.bin
a547770e66ca8aad5be06a97eefb641fb93e5481949b9241eecb5c406c369404		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF21A 5268 bytes
font_01_sfnt_off0001041b.bin
5f7dd2c6c3d38a433543d7accf475794835019a7a6a05e1c91749655922db1cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1041B 10480 bytes

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