Malicious PDF — malware analysis report

Static analysis result for SHA-256 785ea498274fd8d4…

MALICIOUS

PDF

70.5 KB Created: 2021-03-25 02:31:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 8463004c99218377a4ef4fc4edde1373 SHA-1: 74938cc8226a50b3c0d9bc09e6d9fcf2869dc0c2 SHA-256: 785ea498274fd8d40c8de3d73f0d77ccc8c21664014ac22a419b488d427d6e91
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://dafemum.ru/strik?utm_term=arduino+mega+lcd+i2c+tutorial'. This URL is likely used to redirect users to a phishing page or download further malicious content. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • 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=arduino+mega+lcd+i2c+tutorial In PDF document text
    • https://static.s123-cdn-static.com/uploads/4379844/normal_5ff4b4b6b87a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423699/normal_602640d8c2379.pdfIn PDF document text
    • https://cdn.sqhk.co/dorusafe/hbdCgd4/burger_king_near_me_hours_today.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzozuni/hgfhcji/traffic_racing_car_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/wugeguxu/gQ4yT2B/59111098790.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445564/normal_6028440cb1e91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486051/normal_6014590aec62a.pdfIn PDF document text
    • https://cdn.sqhk.co/fuxilumevo/hegeYRA/nostalgia_meaning_in_english_oxford.pdfIn PDF document text
    • https://cdn.sqhk.co/zerurukoraju/ejcgfii/fight_klub_multiplayer_pvp_mmos.pdfIn PDF document text
    • https://cdn.sqhk.co/gijesali/ghCheTf/listening_comprehension_exercises_for_beginners_simple_present.pdfIn PDF document text
    • https://cdn.sqhk.co/pilozarager/agjgdge/fexazujonorezomogu.pdfIn PDF document text
    • https://cdn.sqhk.co/rekubapapup/gghfkiC/bixopixojituvepadowuw.pdfIn PDF document text
    • https://cdn.sqhk.co/gunobawiwax/gvgfULJ/26859152222.pdfIn PDF document text
    • https://cdn.sqhk.co/busoleva/jaNbjel/flow_free_hexes_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/gizetinediz/kjg1cib/charity_commission_annual_report_template_2018.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/1eeae443-fff3-491e-b4ab-efc1fc11f51b/mafiludisifubuxajije.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c3d51f6-ba1d-471e-be75-f6084f977c11/pojegabujoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acb78427-0b66-41d6-9de2-d7d2335c5cd3/how_to_write_lambda_in_latex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d3f5566-1882-417b-8736-9e1297bbbb6e/eureka_nen110a_whirlwind_bagless_canister_vacuum_cleaner_review.pdfIn PDF document text
    • http://falogivaxaf.epizy.com/teknik_cepat_belajar_jawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/334360e7-e8ba-4c48-b29a-29d9199ffa01/remington_model_1100_vs_1187.pdfIn PDF document text
    • http://debukigezi.epizy.com/tikoxewiligixirazogowiji.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_off0000d723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD723 5204 bytes
SHA-256: da3daecf3b55731067d4aace998938ed65b327e67052fab95fff8e043adf7314
font_01_sfnt_off0000e8be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BE 10400 bytes
SHA-256: c5bb140c9421d23d22442e6522dfb0f1cb988833264b89a1e7fde7ded24c5034

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