Malicious PDF — malware analysis report

Static analysis result for SHA-256 469d853f52eb0419…

MALICIOUS

PDF

83.0 KB Created: 2021-03-13 20:03:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dccef55493bb49f1785dc7d6329b8d85 SHA-1: dd775a5b90eb750d51d0a500612f5abf67aad502 SHA-256: 469d853f52eb04190871ad9b27f177d365d935877abe914a0fa4834342859d2d
164 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 ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of a PDF link farm and an embedded URI pointing to 'jumiwimov.ru' suggests a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to 'Windows 10 gratis full 2018', likely a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?utm_term=windows+10+gratis+full+2018
    • https://susesape.weebly.com/uploads/1/3/4/7/134734791/vatuladu.pdf
    • http://sijemogezabusa.sportsontheweb.net/59997036772.pdf
    • https://zaderurumanig.weebly.com/uploads/1/3/4/5/134588260/sirefivod.pdf
    • https://cdn.sqhk.co/gogojelawov/iaVjiRS/66158693813.pdf
    • http://tevaruv.sportsontheweb.net/cyberpunk_2020_review_embargo.pdf
    • https://cdn.sqhk.co/wuwovodegi/Wd7jdgf/voice_recorder_software_for_windows_7_free_download.pdf
    • https://begagezegitajaj.weebly.com/uploads/1/3/1/3/131398046/33204ff871894c.pdf
    • https://cdn.sqhk.co/jupozaregu/gj0Hbib/wuvan.pdf
    • http://rixorevu.getenjoyment.net/mapefebuvikupufazipupixus.pdf
    • http://palikexifumalam.mywebcommunity.org/what_machines_are_in_planet_fitness.pdf
    • http://fujenotaj.22web.org/16992636179.pdf
    • https://pidexijot.weebly.com/uploads/1/3/5/3/135316959/e8e170d6b43.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cf075d60-af7c-4c71-a16c-5c8c125a9bb7.filesusr.com/ugd/cc03df_8ee645209a3f4358afa9ebbb7d588f6a.pdf?index=true
    • http://vowatul.rf.gd/quadratic_equations_finding_the_vertex_and_axis_of_symmetry_worksheet.pdf
    • https://e432c3f7-acc0-403b-bc7f-1b8c16782643.filesusr.com/ugd/6a4899_87c19291b7c148e1a673601d5adacbd9.pdf?index=true
    • https://dc688580-c0ec-4ade-910b-7abffd870ab4.filesusr.com/ugd/096b61_652602f268eb47b7a0665d7538e45a92.pdf?index=true
    • http://xeravujowa.epizy.com/baseball_cap_sizing_guide.pdf
    • https://3e3188f7-d9e9-48da-9af6-4e6760718ee0.filesusr.com/ugd/4f7562_487b0e24c0764529a592ce6e41c42800.pdf?index=true
    • http://latuwukatagowa.epizy.com/rapomidikotavefixujo.pdf
    • http://xejawaji.myartsonline.com/73878654518.pdf
    • http://jitawalidi.epizy.com/ketamofifedi.pdf
    • http://davepizu.rf.gd/integrated_chinese_level_2_part_1_workbook_online.pdf
    • http://roxegubipav.epizy.com/67785334227.pdf
    • https://626fb5af-1d67-41cb-86ce-204163677ff0.filesusr.com/ugd/9d869b_a40bb88d4c6043f7896522f1a5b706c2.pdf?index=true
    • http://perimomu.epizy.com/call_blocker_with_switch_off_mod_apk.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa1e.bin
90ac7094ae6e298c9592bcaa993de1e8f3f593292607c3a5ad980c387380ffb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1E 5464 bytes
font_01_sfnt_off00010cce.bin
7b90a2aa0f3b5058d43cede4fc149f2ed97d7b83c65058927228c04e6a8383c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CCE 10396 bytes
font_02_sfnt_off0001307a.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1307A 4324 bytes

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