Malicious PDF — malware analysis report

Static analysis result for SHA-256 6203c14b513c1eff…

MALICIOUS

PDF

118.9 KB Created: 2021-05-02 02:57:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6f071b23ff8a4b3bf1cfb6a7bded3be7 SHA-1: 210400b6abd626cff8677daf573908560f29829e SHA-256: 6203c14b513c1eff32e700fb72e8f00a143474f843d0c7d28802365af6ebd1db
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains text suggesting a lure related to 'dale earnhardt net worth', likely to entice clicks on the malicious URLs. The ML classifier and ClamAV detection further confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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/strik?utm_term=what+is+dale+earnhardt+net+worth In PDF document text
    • http://sberpodarok2020.online/hx_stomp_presets_metalb7alp.pdfIn PDF document text
    • https://cdn.sqhk.co/kigoxeni/jbv5ber/new_neo_geo_mvs_games.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424646/normal_602f0a7164670.pdfIn PDF document text
    • http://snapchat-alert.com/riichi_mahjong_scoringvtonr.pdfIn PDF document text
    • https://cdn.sqhk.co/rogapakaler/jciPcU4/my_movies_max_app_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501198/normal_6041432e5d5ce.pdfIn PDF document text
    • http://geniusenglish.space/niv_audio_bible_apk_freesy7co.pdfIn PDF document text
    • http://copyrightram.net/59068307417p87r6.pdfIn PDF document text
    • https://cdn.sqhk.co/bidomutarili/fjgBtgd/zibexowebux.pdfIn PDF document text
    • https://cdn.sqhk.co/dudokirabog/aQgcmii/nesozisazewuted.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486061/normal_5feb15beda2ef.pdfIn PDF document text
    • http://sexugaweguko.iblogger.org/gozejufuxutitonedulu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce5aa5be-7a9d-4642-b443-1c74008228e0/lakiwaxal.pdfIn PDF document text
    • http://xaxabegil.epizy.com/service_manual_yamaha_yfz_450.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1800017-e3ca-4695-9982-a759cab13184/wuvojafe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8afa5a1f-f147-4994-9d06-581a0452ccce/51291627175.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee7b53be-3814-4b86-9ca2-c37223352f93/digiland_10.1_tablet_specs.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_off000194e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x194E0 5016 bytes
SHA-256: 0b850523e2ed906f4cfaa43d595a04c8a99e7777fa8d236cdff5e1c5a47f5aff
font_01_sfnt_off0001a5fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A5FC 11864 bytes
SHA-256: e1a6fe72a3dfa205e18bf507704dc2f375cfafd46537be421da4c83e901bd2c7

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