Malicious PDF — malware analysis report

Static analysis result for SHA-256 5917476620f068e5…

MALICIOUS

PDF

73.2 KB Created: 2021-04-01 22:41:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 9aba473a32c79a012044c38d4c625481 SHA-1: 5ad32fb1688a57d0549cfec8a6e1345d0a49b1ab SHA-256: 5917476620f068e55beb69d2fee4649740c76129762fdcd366c7ce1dae2fda61
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file is classified as malicious by ML and ClamAV, and exhibits characteristics of a link farm designed to host malicious content. The embedded URLs and the document body, which mimics a maintenance manual, suggest a phishing or social engineering attack. The presence of external URIs and the link farm heuristic indicate an attempt to redirect the user to malicious sites, likely to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jumiwimov.ru/strik?utm_term=atlas+copco+ga22+air+compressor+maintenance+manual+pdf PDF link annotation
    • https://cdn.sqhk.co/tinolefowi/cjegdun/vavenuvowobeluv.pdfIn PDF document text
    • http://erogan-oficial.site/ipod_touch_update_to_ios_13oenbv.pdfIn PDF document text
    • https://cdn.sqhk.co/fekoguwiwu/WuLJjjy/sasiwefenoso.pdfIn PDF document text
    • https://cdn.sqhk.co/vozogekom/ihvicij/gift_box_template.pdfIn PDF document text
    • https://cdn.sqhk.co/jovowosifo/apHjcgc/pico_rivera_walmart_pharmacy.pdfIn PDF document text
    • https://cdn.sqhk.co/teketerep/icUgebb/don_t_rush_challenge_tiktok_comment_faire.pdfIn PDF document text
    • https://cdn.sqhk.co/junikesiza/Gs9nkgd/coordinate_plotting_activity.pdfIn PDF document text
    • http://fringigejy.site/how_to_run_a_haas_cnc_lathe8ns5o.pdfIn PDF document text
    • https://cdn.sqhk.co/vitimosugu/yRgiQUx/sovawewewuwojifoj.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/zepifudoxapo/fakenu.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/70735860018.pdfIn PDF document text
    • https://d650f791-4ca6-4964-96f1-ba9fac0414c1.filesusr.com/ugd/adf9cb_043b504783e74e75ad878509f51396f3.pdf?index=trueIn PDF document text
    • https://c1908cc8-b41e-4b5b-ab1c-53d28a7f2745.filesusr.com/ugd/913720_1543cbaa711f41a582e84f2c80a28020.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/negonanopix/jojetatewudoxabiv.pdfIn PDF document text
    • https://968bac2e-1409-45a7-bd11-2c37eba47390.filesusr.com/ugd/c81504_2b92983756e54a4abc18240f146f21d5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fipijife/flexible_pavement_report.pdfIn PDF document text
    • https://4c5ad993-366d-4b3a-aa99-9b6f56583180.filesusr.com/ugd/01e791_5f57a8fc611b475e93b0dc0227457b8a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/14961eef-a086-4e8c-8d4f-4d0536b4a39c/harry_potter_and_the_sorcerers_stone_book_review_essay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11444496-b086-4241-bb06-04689edebde5/kisevizulumebafal.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/when_to_use_spell_save_dc.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_off0000de10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE10 5596 bytes
SHA-256: 94df9a67995fc33125e1404053a7b6077aeb8c564167a5a299f270c814f6becf
font_01_sfnt_off0000f10a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10A 11196 bytes
SHA-256: 2ff158f8ae8e710391d51864fe62006d15d293dcddd8003f74511fbd75e2e1ba

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