Malicious PDF — malware analysis report

Static analysis result for SHA-256 131233238c2106d8…

MALICIOUS

PDF

71.5 KB Created: 2021-03-05 06:40:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6b037807c1cd44876beb1f2f000c9f8d SHA-1: bd2a611c4cb4a8beff02654cee67c9fc52abf493 SHA-256: 131233238c2106d8aa9d1a01b2d7094e4a315e34947a96bbda84e9397d6ab871
154 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, with at least one pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to contain keywords related to the linked content, suggesting a phishing or SEO spam lure. The presence of many external links indicates an attempt to drive traffic to potentially malicious or ad-filled websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=gabriel+air+shocks+49234 In PDF document text
    • https://cdn.sqhk.co/vetukalujir/amjgjbB/jadipuwutuwosalizawusev.pdfIn PDF document text
    • https://cdn.sqhk.co/genonitag/Vgde6gf/hero_or_villain_battle_royale_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tamaladafa/ggifbhb/my_planet_game_cheats.pdfIn PDF document text
    • https://cdn.sqhk.co/xinulezebi/cicdiG6/3589988748.pdfIn PDF document text
    • https://cdn.sqhk.co/butituguxur/ZPaji4x/zombie_attack_script_2020_pastebin.pdfIn PDF document text
    • https://cdn.sqhk.co/busibelifiv/PgdmheO/91675564858.pdfIn PDF document text
    • http://vatojaginasi.22web.org/53534741612.pdfIn PDF document text
    • https://cdn.sqhk.co/putuziboki/Kqjdihu/snake_vs_block_all_skins_unlocked.pdfIn PDF document text
    • https://cdn.sqhk.co/jawutuwek/9fRifij/bendy_juicy_simulation.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/timituvupame/sexomepotaxuguxa.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/autobiography_format_example.pdfIn PDF document text
    • https://0793e221-2e7e-4176-aae8-4ff4b75d8f7a.filesusr.com/ugd/64bd79_110fd6e8de384aab952c23ff4d423930.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mizeteb/adverse_event_case_report_form.pdfIn PDF document text
    • https://ce099f17-eb12-430b-a452-8d789b3ee5a8.filesusr.com/ugd/aef5b7_67f0b619dbf64caba28434e63c56d036.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/kumojubu.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/back_wars_hack_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/89561689040.pdfIn PDF document text
    • https://4e4301d6-cc9a-4939-960a-6b497c1efea6.filesusr.com/ugd/d78803_442680d09b1a449aa222e07ed0e8a435.pdf?index=trueIn PDF document text
    • http://xowomowipuzu.epizy.com/sync_3_android_auto_update_date.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/lord_of_the_flies_chapter_two_answers.pdfIn PDF document text
    • http://terobuvopo.rf.gd/what_are_the_six_steps_of_the_problem_solving_process.pdfIn PDF document text
    • http://xelidev.rf.gd/25426652180.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/barracuda_firewall_admin_guide.pdfIn PDF document text
    • https://45ed8376-e832-497f-ab20-0a31924dc5db.filesusr.com/ugd/4b7290_892aa0d31415487d89e9e2d43eb741a9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/free_leaflet_template_mac.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_off0000d9d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D4 5664 bytes
SHA-256: 4e2d7f35e18f8aa8b9040cf27946782fd7dc5d1f0a2040b59ac8a3e26d76a2ae
font_01_sfnt_off0000ed0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0C 10412 bytes
SHA-256: 9bf34414ef403d48d87e0714536c1541d6bdb8c909ba8185e54b4c6c8af3d7a2

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