Malicious PDF — malware analysis report

Static analysis result for SHA-256 5397ff578e2a3c30…

MALICIOUS

PDF

81.0 KB Created: 2021-03-29 14:32:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 6722872065119ea535adaea12639ff56 SHA-1: b27c810337a071610dad4471af0ca4ef0d4d40e8 SHA-256: 5397ff578e2a3c308ac4ebfd5096d32c69787d28a66f0c7302b000ea465bbaa0
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a URL designed to trick users into downloading a malicious file. The ML classifier and ClamAV detection strongly indicate malicious intent, and the presence of numerous links suggests a link farm or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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 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.
  • 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://dafemum.ru/wix?keyword=granny+mod+menu+apk+download+free In PDF document text
    • https://cdn.sqhk.co/matajikiwov/ifhhgix/f1_abu_dhabi_tv_schedule_usa.pdfIn PDF document text
    • http://fopekoriw.sportsontheweb.net/45306325582.pdfIn PDF document text
    • https://cdn.sqhk.co/kizofapekeku/iajccia/38500106221.pdfIn PDF document text
    • https://cdn.sqhk.co/dinigivo/njbjeaQ/69213262225.pdfIn PDF document text
    • https://cdn.sqhk.co/jogeguzotire/ibjiTgh/bricks_breaker_infinity_mod_apk_unlimited_money.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377663/normal_5fe42b5c7b4c5.pdfIn PDF document text
    • http://bevamifugidujew.scienceontheweb.net/azan_ke_baad_ki_dua.pdfIn PDF document text
    • https://cdn.sqhk.co/mowanideju/hfjijeE/events_this_weekend.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwaseja/uOiijbR/modunotulivapila.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485826/normal_602402b76299f.pdfIn PDF document text
    • https://cdn.sqhk.co/bulunazi/bihjhha/tiny_house_builders_new_brunswick_canada.pdfIn PDF document text
    • http://zegofivuwirukon.22web.org/c._r._c._c_ka_full_form.pdfIn PDF document text
    • https://cdn.sqhk.co/tupipitijil/hhMjfGk/roblox_username_and_password_guessing_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/simikitivo/lJphiii/zukorojanapoxolejizi.pdfIn PDF document text
    • http://judupebe.getenjoyment.net/93515692122.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/farefasejikap/barnett_jackal_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/business_process_outsourcing_book.pdfIn PDF document text
    • http://sabixisadosafa.rf.gd/59971016591.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/pejokimetigomukabad.pdfIn PDF document text
    • http://fojurerofa.epizy.com/69816986980.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/mla_format_website_citation_example_no_author.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/97467932001.pdfIn PDF document text
    • http://vazorilumi.epizy.com/75662268423.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF14 5052 bytes
SHA-256: b15543581ca19b413cde110f63d7f7cf69c9518529b2466d806f8b97769b2f39
font_01_sfnt_off0001003d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1003D 11680 bytes
SHA-256: 85ca9ff51d17d14a012e7fe51c5031f8095a408cc09627c0f24ab6a8947a289c
font_02_sfnt_off0001283f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1283F 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2