Malicious PDF — malware analysis report

Static analysis result for SHA-256 057118d2aa1cf2d3…

MALICIOUS

PDF

68.1 KB Created: 2021-03-22 07:51:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: a1a87b2388dd668917222aaf57e5b5f8 SHA-1: 75424b64c143a6dd167f01ebc7b28e4e7b32f7e0 SHA-256: 057118d2aa1cf2d3422fb532a3149b65e5835fc1ff9e8a5e56f2b27046f68c67
154 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical alert for a malicious redirector link and a high-confidence ML classification. The embedded link directs to 'https://yafferge.ru/strik?utm_term=sharp+cv-2p10sc+parts', indicating a phishing or malware distribution attempt. While no scripts were explicitly extracted, the nature of the link and the PDF format suggest it's designed to trick the user into navigating to a malicious site, likely as part of a spearphishing campaign.

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://yafferge.ru/strik?utm_term=sharp+cv-2p10sc+parts In PDF document text
    • http://afterdealer.pro/how_to_use_a_fluke_324_clamp_meterx4m3h.pdfIn PDF document text
    • http://uscarins.info/20360697563cyths.pdfIn PDF document text
    • https://cdn.sqhk.co/nosimasiv/7hcCWN2/51735872117.pdfIn PDF document text
    • http://astropsychology.site/8739832491422vgq.pdfIn PDF document text
    • http://cmb-accueil.com/2018_toyota_camry_se_hybrid_mpgr8vja.pdfIn PDF document text
    • https://cdn.sqhk.co/kavuweduti/27pSgfz/birthday_party_poster_free_template.pdfIn PDF document text
    • http://terugate.mypressonline.com/18484247144.pdfIn PDF document text
    • https://cdn.sqhk.co/josurowelimu/iadTDie/77709399071.pdfIn PDF document text
    • http://katermore.ru/elton_john_songs_from_the_west_coast_wikipedia3w6h8.pdfIn PDF document text
    • http://lotibamuzuti.scienceontheweb.net/arthur_schopenhauer_biography.pdfIn PDF document text
    • https://cdn.sqhk.co/rutunidosaw/rJjhaxz/guided_math_game_plan_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/xezalagefog/dIgitgd/3611178854.pdfIn PDF document text
    • http://rejemezurufoveg.mywebcommunity.org/translating_word_problems_into_algebraic_expressions_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/fuluzezufe/gjthiqi/crazy_frog_axel_hd_video_song.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/66118126346.pdfIn PDF document text
    • http://bajekixizosi.myartsonline.com/25932949125.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/bones_episodes_tv_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/96735623540.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/building_planning_and_drawing_ss_bhavikatti.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/adultery_novel_by_paulo_coelho_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/86327902850.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/27992079738.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_off0000cced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCED 5508 bytes
SHA-256: 6901e85283efc8602cdfa0eced6e7d6072b2a48a744b5b71b8cb9d8a9b2bfe86
font_01_sfnt_off0000dfb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB0 10456 bytes
SHA-256: 3ece787a2538855dbe21e61ba4da6565b64f556acb74c7412f697f259093d59b

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