Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6d9ed0ca5868b17…

MALICIOUS

PDF

78.2 KB Created: 2021-02-25 04:52:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6b2a972d71e9bbdca275d513c51c1ef1 SHA-1: 98c1721dee176723b1d8e1f27a8237290cbcc0eb SHA-256: e6d9ed0ca5868b17ceb05356c21c95ecfac2fc185b7e558c6cb7a1b3ae99b35d
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to celestial events, likely a lure to entice users to click the malicious links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

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
  • 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://crophysi.ru/strik?utm_term=what+star+is+going+to+be+visible+on+december+21st In PDF document text
    • http://rowowesofazov.medianewsonline.com/22585089631.pdfIn PDF document text
    • http://xteenware.online/are_burger_king_impossible_burgers_healthyzyiao.pdfIn PDF document text
    • http://zufonirawanowo.iblogger.org/accounting_equation_worksheet_template.pdfIn PDF document text
    • https://fupexorugukemig.weebly.com/uploads/1/3/0/8/130814763/cab4473.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/2haTjez/dragon_ball_stickman_fight.pdfIn PDF document text
    • https://cdn.sqhk.co/zururodi/iciePqN/how_can_draw_ice_cream_cone.pdfIn PDF document text
    • https://dawifibikinofi.weebly.com/uploads/1/3/4/6/134682228/nurasig.pdfIn PDF document text
    • https://boxatikavizag.weebly.com/uploads/1/3/4/6/134680825/25527fa173.pdfIn PDF document text
    • http://shimano-stradic.ru/735234370382hiht.pdfIn PDF document text
    • https://logifuvixejexa.weebly.com/uploads/1/3/6/0/136019385/wupelamuwisobef_werafigu_wagunijonesejiw_vetomeroj.pdfIn PDF document text
    • https://cdn.sqhk.co/vopofuxo/wiajdgd/91430259153.pdfIn PDF document text
    • http://buytoday.cc/magnetocaloric_effect_book9bs1j.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
    • http://sazojojuw.rf.gd/faded_easy_piano_sheet_music_with_letters.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/49764057053.pdfIn PDF document text
    • http://miwufojo.epizy.com/65139962490.pdfIn PDF document text
    • http://bijamujijupife.epizy.com/estimating_square_root_worksheet_8th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/jewish_publication_society_tanakh_online.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/wamadegavuxu.pdfIn PDF document text
    • https://s3.amazonaws.com/kisagoz/google_sheets_utilities._formatdate.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_off0000e6b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B2 5536 bytes
SHA-256: 00b01dad9725d456d01612732713bbba832c5c7c01a8b8a76652764f6a9409a7
font_01_sfnt_off0000f965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF965 10416 bytes
SHA-256: 476afe3aaf16b5a80017944f10af569447ca2504b02766b27b5606a461dcec87
font_02_sfnt_off00011d12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D12 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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