Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2d8d4113610fd5f…

MALICIOUS

PDF

83.5 KB Created: 2021-03-20 02:59:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 12d4e3e4cc6734d5803fe248b814a7be SHA-1: 19a72d2d60a1b336d8051b5a0bba233ceab1a9c5 SHA-256: a2d8d4113610fd5f0f02315d8651313f204e6a378cea9b091308e43c1788cc40
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/strik?utm_term=how+to+fix+screen+mirroring+samsung+tv PDF link annotation
    • http://easybranding.org/how_to_put_foil_decals_on_nailsavoo3.pdfIn PDF document text
    • http://bixaxivajujojar.mypressonline.com/online_english_grammar_checker_tool_free.pdfIn PDF document text
    • http://tomogorman.com/popixi7avur.pdfIn PDF document text
    • http://jovefupe.mywebcommunity.org/18733602293.pdfIn PDF document text
    • http://segway-wheelchair.ru/george_lakoff_y_mark_johnson_metforas_de_la_vida_cotidiana2jdwa.pdfIn PDF document text
    • http://pemizirevubel.mywebcommunity.org/11381590289.pdfIn PDF document text
    • http://tenipimutav.mywebcommunity.org/comprendre_le_bouddhisme.pdfIn PDF document text
    • http://piwulag.sportsontheweb.net/beginner_s_guide_to_darkbasic_game_programming.pdfIn PDF document text
    • http://sovuradema.medianewsonline.com/laraxunig.pdfIn PDF document text
    • http://xurekurise.iblogger.org/73987553329.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tirujukixiw.epizy.com/tonixagibedupajopojasino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a052de5-b2af-49a7-9eb4-8326d19a4d5a/cuisinart_deluxe_digital_convection_toaster_oven_broiler_costco.pdfIn PDF document text
    • http://zewebuguv.epizy.com/foxamigobojivaxuxogufapu.pdfIn PDF document text
    • http://namerunu.rf.gd/what_happens_behind_closed_doors_quotes.pdfIn PDF document text
    • http://xeleleragakiji.epizy.com/pokesinowubelanoso.pdfIn PDF document text
    • http://judiserod.onlinewebshop.net/how_do_jet_engines_work_youtube.pdfIn PDF document text
    • http://gibilumopujilot.epizy.com/national_youth_service_online_application_form_2020.pdfIn PDF document text
    • http://fukuselumetu.myartsonline.com/introduction_to_arrays_in_c.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d708ffb4-2ce3-4de6-a448-1255949724d6/tilawurekox.pdfIn PDF document text
    • http://tuxodonim.epizy.com/friedrich_nietzsche_best_books_to_read.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F4 5352 bytes
SHA-256: f2203af888421f81c203554081212a7625d49da5a663fe32c4fe414390e09c64
font_01_sfnt_off0001192d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1192D 11088 bytes
SHA-256: 1fb38514d4c61affbd9223e7d12d64803be09157e2b4bae763889c7a9f661ade

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