Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5282f66564fd84e…

MALICIOUS

PDF

154.3 KB Created: 2021-03-29 19:07:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 4386c52108a98c2ca1a1db35dbb142d2 SHA-1: 17e19c35da5e5ba576e796120944eda6b2a83994 SHA-256: e5282f66564fd84ef4ddc84703ba9c98dd5ca8a7c18c6375d1bf1e79aaba01a3
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or social engineering attack. The 'Fake CAPTCHA' heuristic indicates the document is designed to deceive the user into performing an action, likely to download or execute a secondary payload. Numerous external URLs were extracted, suggesting a link farm or redirection mechanism to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/aws?utm_term=relion+prime+e04 PDF link annotation
    • https://cdn.sqhk.co/gemesikexo/ahe5UqE/transparent_tv_screen_cost.pdfIn PDF document text
    • http://nadefememidep.medianewsonline.com/xabolufarizeger.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490539/normal_5fc9fb6a73d45.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483587/normal_5febd55ad7a09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390329/normal_605d0bc19db95.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410447/normal_5fc5a1d1b5560.pdfIn PDF document text
    • https://mabamigetope.weebly.com/uploads/1/3/4/4/134493328/b1e20782534.pdfIn PDF document text
    • https://vurodotug.weebly.com/uploads/1/3/1/4/131454057/6671152.pdfIn PDF document text
    • https://cdn.sqhk.co/lajefage/JkAuii5/snowboard_craft_freeski_sled_simulator_games_3d.pdfIn PDF document text
    • https://cdn.sqhk.co/zoribakim/xidhccF/stone_blast_pan.pdfIn PDF document text
    • https://cdn.sqhk.co/geruxibab/hVCEMo3/wegozabej.pdfIn PDF document text
    • https://cdn.sqhk.co/mumeriretepi/hbgihhi/raxawuwurotovejefisotano.pdfIn PDF document text
    • https://zinurutiman.weebly.com/uploads/1/3/5/2/135295757/tukiruxel.pdfIn PDF document text
    • https://cdn.sqhk.co/wenisuvuroju/0ihvjdK/jumpers_for_goalposts_1_unblocked.pdfIn PDF document text
    • http://xepidenad.scienceontheweb.net/rain_dial_manual_run_all_stations.pdfIn PDF document text
    • https://daniwevuwawudo.weebly.com/uploads/1/3/4/8/134849628/228320.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/jhjhfJh/68513125061.pdfIn PDF document text
    • https://cdn.sqhk.co/pifonode/6je3eii/mk11_past_kombat_league_skins.pdfIn PDF document text
    • https://fikozipe.weebly.com/uploads/1/3/4/8/134887908/nelago.pdfIn PDF document text
    • https://cdn.sqhk.co/sitopizol/ijugiib/lasinizobegovevaxo.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://mujozigimak.rf.gd/how_big_is_1_8_scale_rc_car_in_inches.pdfIn PDF document text
    • http://rupesujutiwu.myartsonline.com/77109861998.pdfIn PDF document text
    • http://diveruwafulebes.epizy.com/gojejeviti.pdfIn PDF document text
    • http://rewivelu.rf.gd/oracle_certification_for_sql_and_pl_sql_developer.pdfIn PDF document text
    • http://gawadatij.rf.gd/giwibikaz.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001f70e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F70E 3156 bytes
SHA-256: 9afafd343faf9bd4a620e0969b206a5cf09b161956828bf60b20be1444c86b42
font_01_sfnt_off00020241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20241 1840 bytes
SHA-256: 54a10400d8d9746f7d635901a988a6738b90e9e2d0141e41cb36d457773262b7
font_02_sfnt_off00020b41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20B41 4520 bytes
SHA-256: 5403a2149270403abb64449c7ccf5557d6ac6ce0a92eecfa9f1ebe12f016ac66
font_03_sfnt_off00021a74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21A74 15832 bytes
SHA-256: 8c501bbc1f7d92add4aa77377740a095c6baf659529032fea948f0101524fd3a
font_04_sfnt_off00024c92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24C92 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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