Malicious PDF — malware analysis report

Static analysis result for SHA-256 46e50cbb5471ac82…

MALICIOUS

PDF

83.5 KB Created: 2021-04-04 05:43:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c92cd9f34618376374d213b336346d10 SHA-1: 7471b8ec0498c70a8af14e56567aafc378cbc524 SHA-256: 46e50cbb5471ac82db570029fd5ab2b1a855331c1ddb444978567e72e98103fb
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM' containing 30 external links. The primary URL, 'https://jacksth.ru/strik?utm_term=how+long+should+you+charge+a+solar+watch', suggests a lure to a potentially malicious site. ClamAV detection and ML classification further support its malicious nature, indicating it's likely a phishing or scam document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/strik?utm_term=how+long+should+you+charge+a+solar+watch
    • http://punevufazeji.iblogger.org/namabigirelukulilikavefaz.pdf
    • https://cdn.sqhk.co/fewibefanid/BN5ighb/class_12_history_book.pdf
    • http://tuimag.ru/lipitemazuseronetogosode5t4ln.pdf
    • http://numusuri.22web.org/buvukovuzopirojibodudazip.pdf
    • http://salonhq.xyz/mastika_hadith_jilid_3an25f.pdf
    • http://womukob.iblogger.org/change_to_word_file.pdf
    • https://sirutobij.weebly.com/uploads/1/3/0/7/130776617/kidanebepivubu-wowubowo-lekazaramis.pdf
    • https://bexenexitefixu.weebly.com/uploads/1/3/4/7/134725849/bapufatoxuwaful.pdf
    • https://xatotowo.weebly.com/uploads/1/3/2/7/132740458/dozedajorigufi_sagedetesimu_jimebu.pdf
    • http://ogranifruit.space/33729221275tvd1i.pdf
    • https://gevobudijopu.weebly.com/uploads/1/3/4/8/134880408/zofem-jatuz-rebowisi-gujerifa.pdf
    • https://cdn.sqhk.co/futidiwe/aOigXK3/17935941140.pdf
    • http://kefets.xyz/super_mario_land_3dszld69.pdf
    • http://helplnstagramcontact6088758.com/scatter_plot_correlation_and_line_of_best_fit_worksheet344lm.pdf
    • https://xotikavetaj.weebly.com/uploads/1/3/4/8/134861849/musapomaxeb-xomubekabo-metureli.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/41eb25aa-2c0a-47ab-91f6-6cb218bbcfee/how_do_spell_slots_work_with_multiclassing_warlock.pdf
    • https://uploads.strikinglycdn.com/files/3279dc7f-c6e9-4282-bfef-d8e00f9a6376/gisikugipuvuf.pdf
    • https://uploads.strikinglycdn.com/files/e523922c-ece4-449d-863e-e7e59ec92351/14084559773.pdf
    • https://ef5e9b3f-1a8e-4c79-9b60-34b8f8133c96.filesusr.com/ugd/18574e_13432ee0bae2494abbe7d1a6982b802f.pdf?index=true
    • https://6f847715-c85a-45d9-ae5c-7c68cc800588.filesusr.com/ugd/6e100b_9cd6b7b7f684448c9e4703f3b2fa0f89.pdf?index=true
    • https://e8f98835-b194-42a5-b43f-fe2f29920dd6.filesusr.com/ugd/bf650e_437fb40b84fd4957b6c0e583775e03a0.pdf?index=true
    • https://5862e4ea-63a6-4c92-af93-e06d02d1a664.filesusr.com/ugd/eaa371_eb1f396b08b7484caa87f89ee74c4461.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2fca780f-fe91-44d9-a9ff-d1979cce636a/95263335581.pdf
    • https://uploads.strikinglycdn.com/files/af6c6ad3-6f96-43ed-8bc6-27570a720175/heat_and_mass_transfer_cengel.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010866.bin
06be156d4ba8d36f5cd5242e68c291bbcbb509b907b38c5e9dfc474723572ef4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10866 5356 bytes
font_01_sfnt_off00011aad.bin
368d525f6778714216dd29b277f968a646fe5617ce926c5384f309d4cb1737cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AAD 10624 bytes

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