Malicious PDF — malware analysis report

Static analysis result for SHA-256 9df6e2c471ea6127…

MALICIOUS

PDF

104.5 KB Created: 2021-02-24 21:49:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b358d065c1268b534d548dbbad7ee322 SHA-1: b0c5c4a8b4831d189715a27465671e065c92375a SHA-256: 9df6e2c471ea6127ae9b221ec341b90713b255dc91e9883b153bda75fab94e1f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. It contains numerous embedded URLs, many pointing to disposable domains or link farms, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text related to 'Citizenship in the world merit badge pamphlet 2020', likely a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/strik?utm_term=citizenship+in+the+world+merit+badge+pamphlet+2020 PDF link annotation
    • https://cdn.sqhk.co/rikopekela/c5gcje4/silent_planet_iowa_city.pdfIn PDF document text
    • https://cdn.sqhk.co/rixakowu/gizBhg0/fix_items_earthbound.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527237/normal_60031ddac7d9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375350/normal_602d0c398c23e.pdfIn PDF document text
    • https://cdn.sqhk.co/miwizawi/vhaNVzA/zombie_diary_2_hack_apk_2020.pdfIn PDF document text
    • http://vuzitofakomuj.22web.org/their_eyes_were_watching_god_summary_chapter_6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489607/normal_600400da9e685.pdfIn PDF document text
    • http://nititozokepukam.22web.org/kavakimetudagunive.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425912/normal_5ffc03abb3bf8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wigezenefibi.epizy.com/allo_allo_theme_tune_sheet_music.pdfIn PDF document text
    • http://sedejavuguz.rf.gd/best_free_games_for_android_tv.pdfIn PDF document text
    • http://vujapaporetakik.epizy.com/zajajejenevekulodeterikon.pdfIn PDF document text
    • http://nuxizutize.rf.gd/top_movie_sites_illegal.pdfIn PDF document text
    • http://defipezisezujor.rf.gd/how_to_backup_contact_android_to_iphone.pdfIn PDF document text
    • http://mexowotevofo.rf.gd/catabolism_anabolism_worksheet.pdfIn PDF document text
    • http://zesosugukazake.epizy.com/gabezokobavexaxu.pdfIn PDF document text
    • http://gijaguvid.rf.gd/ableton_live_10_plugins_free.pdfIn PDF document text
    • http://zomimek.epizy.com/gufobilijafinipate.pdfIn PDF document text
    • http://bepenaguvofiw.epizy.com/73346123141.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013b27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B27 5832 bytes
SHA-256: 0820b537cd9851499164a8253857ff7f4873f40094ca892b06cb5cfbe7b74a9c
font_01_sfnt_off00014ee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EE2 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off00015770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15770 11104 bytes
SHA-256: 6c87d9558556e81802526b60063bf26f43f0aaa4a0b648db6a99c06602aac5ba
font_03_sfnt_off00017d30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D30 16512 bytes
SHA-256: 09d35ab542fbcbc67810866bd5afb813722876f919e1f5f11ea9b8b40364b03f

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