Malicious PDF — malware analysis report

Static analysis result for SHA-256 8571a526eacc59c5…

MALICIOUS

PDF

83.7 KB Created: 2021-03-06 03:23:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1bbf3bcc9d3fae2b89bcf3f59a1e8ac0 SHA-1: 6f724fab6840015335403db56407be08038d34ca SHA-256: 8571a526eacc59c5f360a09905f4493b7a0fb4f837a2d6a93711d13e0cb6b8e6
126 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a phishing or link-farming operation. The PDF's structure and the presence of external URIs strongly indicate it's used to redirect users to malicious websites, likely for credential harvesting or malware distribution.

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://pelibifir.ru/award?keyword=is+percy+jackson+part+of+greek+mythology PDF link annotation
    • http://gopidap.scienceontheweb.net/26036789761.pdfIn PDF document text
    • https://cdn.sqhk.co/xaloxezajaga/Nzfgejd/sugam.pdfIn PDF document text
    • http://puwexakibo.iblogger.org/banjara_video_song_number_padal_ing.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392191/normal_603ea878e4c8c.pdfIn PDF document text
    • https://cdn.sqhk.co/noxivudeva/chcIje5/76688746984.pdfIn PDF document text
    • http://malanefire.sportsontheweb.net/tenulasaj.pdfIn PDF document text
    • http://xewosaxebojufir.iblogger.org/income_statement_excel_template_free.pdfIn PDF document text
    • http://pugisapi.mypressonline.com/barnett_jackal_crossbow_hard_case.pdfIn PDF document text
    • https://cdn.sqhk.co/laruxibut/crid0he/minecraft_pocket_edition_seeds_1._14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489415/normal_6025b2d130be3.pdfIn PDF document text
    • http://balegetiwep.mywebcommunity.org/thetford_rv_toilet_flange.pdfIn PDF document text
    • https://cdn.sqhk.co/bapulofuw/ighctgg/it_measures_water_flow_puzzle_page.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402481/normal_603281e5d75f0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464995/normal_5fde5965bc608.pdfIn PDF document text
    • https://cdn.sqhk.co/muribirigim/hhijVhj/new_world_gameplay_combat.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/jalasilunaz/innova_3020b_user_manual.pdfIn PDF document text
    • http://zinogagagobuv.epizy.com/craftsman_chainsaw_carburetor_adjustment_screws.pdfIn PDF document text
    • http://mobopufo.rf.gd/bahubali_movie_free_mp4.pdfIn PDF document text
    • http://wigugagekubog.rf.gd/process_heat_transfer_dq_kern_solution_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/17988213672.pdfIn PDF document text
    • http://dujojovixotik.epizy.com/canard_pc_hardware_35.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/toggle_button_onclicklistener_android.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_off00010b77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B77 5608 bytes
SHA-256: 80de152fe8804235337fd21fdcee10308a1b1016f290fd0e1b6cd3674d59e679
font_01_sfnt_off00011e80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E80 10196 bytes
SHA-256: f9a8d3e45ca3c356d677859121f164c7212ee41bc2b2f61650de24367bff7e7f

Open this report in the interactive analyzer, or submit your own file for analysis.