Malicious PDF — malware analysis report

Static analysis result for SHA-256 20e0a82912a503df…

MALICIOUS

PDF

165.5 KB Created: 2021-03-07 10:24:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c2b6b3c8c528e092c20797b677b77aa SHA-1: dc31d1947c5635fdc71919337cebbe8caac56abd SHA-256: 20e0a82912a503dffc6c593082ae0a103c1ba20a20c2709d62eef16d30697392
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. ClamAV and ML classifiers strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://seumenha.ru/wix?keyword=pollock+elementary+school
    • https://cdn.sqhk.co/tosilura/hg2QjbM/kididebogesadofajidobixo.pdf
    • https://cdn.sqhk.co/xakelafu/Grl9sgf/maals_jump_over_the_moon_watch.pdf
    • https://cdn.sqhk.co/savunowudob/28Uuqig/dewodevumavolesuputixewog.pdf
    • https://cdn.sqhk.co/rularijulen/eSQjdig/ultra_hd_wallpapers_4k_nature.pdf
    • https://cdn.sqhk.co/miburixegapu/e8jdOCj/scooby_doo_zombie_island_wikipedia.pdf
    • https://cdn.sqhk.co/fosulavale/bgcH9jf/stormfall_rise_of_balur_mod_apk_revdl.pdf
    • https://cdn.sqhk.co/wamitavixitu/jeii610/zuxeniw.pdf
    • https://cdn.sqhk.co/dasofuduveje/hghhbqF/84426171196.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d29ead28-8081-48bc-b157-e5165998b718/nabuzex.pdf
    • https://3568c1c9-c281-4b9a-9ea9-d5d291e0176b.filesusr.com/ugd/e5d8db_1942a8f04c904d47b779392346e7d498.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5102da47-8aca-41b7-886b-313fc587243a/gusuriba.pdf
    • http://guvamimifufirar.rf.gd/75312552548.pdf
    • https://ad9e3d1f-bb22-46ca-892e-b6aa3325a756.filesusr.com/ugd/837d34_9c42ee956ee14079bb7c6c07b32cea93.pdf?index=true
    • http://ratazudawi.epizy.com/characteristics_of_life_worksheet_high_school.pdf
    • http://mijikabetabup.rf.gd/suitcase_fusion_team_sync.pdf
    • https://34ea5197-a9e9-4ba5-99bb-a7dd7aeba98b.filesusr.com/ugd/234f58_8945424f2b8544e891ba6291fd175638.pdf?index=true
    • http://bavipilebevim.epizy.com/como_instalar_power_pivot_excel_2013.pdf
    • https://b5c4f4dd-ae1f-4f6a-908c-f463551224e4.filesusr.com/ugd/dafd60_52d47345ad77490e871a9feff5c5126d.pdf?index=true
    • https://s3.amazonaws.com/lopeteb/15988009618.pdf
    • https://s3.amazonaws.com/xunilukegez/chemistry_of_living_things_powerpoint.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_off0002537d.bin
04f0a193be390c0a5121c12a0ec5cd38f466f33648febd5e626dad759425ec3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2537D 5204 bytes
font_01_sfnt_off0002650d.bin
cbb598dbfd616ab488654384df5e6290ac8597579e76886ccc8496e21bc63928		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2650D 10308 bytes

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