Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d2683b462c1948f…

MALICIOUS

PDF

77.4 KB Created: 2021-03-22 00:18:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 6a267f3e8b8701410d43d7130aee758a SHA-1: de23b4643453071ab1ffa1935ce24f8720c29b2e SHA-256: 0d2683b462c1948ff8119acf14f82b9be6a9e200db94b648e60c76379943ebac
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to link farms hosted on disposable domains, a common tactic for phishing or distributing malicious payloads. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/award?keyword=american+english+file+1+workbook+pdf+slideshare PDF link annotation
    • https://cdn.sqhk.co/vemunaxudug/jpgdhi7/fagaludilu.pdfIn PDF document text
    • https://cdn.sqhk.co/miwizawi/fjhD0if/football_games_2017_apk_download.pdfIn PDF document text
    • http://kovatafob.mypressonline.com/29496493675.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/jdrjhgi/tofadeguturaduzegosusanam.pdfIn PDF document text
    • https://cdn.sqhk.co/kenipafitu/ibihdDZ/99096288619.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/american_gods_season_1_parents_guide.pdfIn PDF document text
    • http://barabew.iblogger.org/bluebeam_2017_trial.pdfIn PDF document text
    • https://cdn.sqhk.co/jaziwuke/Rr1hagd/80761190530.pdfIn PDF document text
    • https://cdn.sqhk.co/murerezusa/7vlyigs/pufutorebutaloj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wesatume.atwebpages.com/warcraft_3_original_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6173101c-2e87-4f89-9f39-83d14c9f28ff/what_fruit_can_you_eat_on_exante_diet.pdfIn PDF document text
    • http://putudodizisag.epizy.com/liu_cixin_the_three-body_problem_book.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/22671364895.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8eee2439-d0c1-4dae-8d4f-2e58da102830/gebirivukafukorel.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/bass_boosted_punjabi_songs_320kbps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3db19f96-7e55-4e65-bc36-d43266aecf24/step_by_step_money_origami_flower_instructions.pdfIn PDF document text
    • http://pazizota.rf.gd/niruvarepugudawulisib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7138b0e8-3b42-440c-873f-7c40356d526d/midnight_sun_full_movie_online.pdfIn PDF document text
    • http://jelesopufif.epizy.com/srimad_bhagavatam_in_tamil_with_meaning_free_download.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_off0000eab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB6 5904 bytes
SHA-256: cc9cf7bd58363eda8077d2fd7d80d8f2be22c9647a57e8566d93b67db02c5837
font_01_sfnt_off0000feba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBA 14048 bytes
SHA-256: e29c9779d3c233c6df2d03210abd4b7a95596270cc0468f9ffc7472ac3165ab3

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