Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b19f1402a980e1d…

MALICIOUS

PDF

77.8 KB Created: 2021-03-20 07:14:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ae75eab6a432e28b9aa1ff7431ffc1d7 SHA-1: 25a9bfe63b5d952254d6eb8e96ba2fbeb80b99aa SHA-256: 2b19f1402a980e1d0c69747101eff97be30d497cfb89fbf88ea5eb829bc6c2e3
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. ClamAV and ML classifiers indicate malicious intent, specifically identified as phishing. The embedded URLs point to various websites, likely intended to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 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.
  • 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://botokaw.ru/award?keyword=data+analysis+research+paper+pdf PDF link annotation
    • https://xejotonevuxujuj.weebly.com/uploads/1/3/1/3/131379732/16b7f.pdfIn PDF document text
    • https://wugoxuvalego.weebly.com/uploads/1/3/4/0/134017666/ae070200b9c0f.pdfIn PDF document text
    • http://visionnew.xyz/adobe_animate_cc_2020_release_datedmass.pdfIn PDF document text
    • https://dabefetuxof.weebly.com/uploads/1/3/5/3/135320161/rotaje_vagovoneka.pdfIn PDF document text
    • http://visodesux.iblogger.org/gikulolusisunamavadidafo.pdfIn PDF document text
    • https://fidejilajusaxe.weebly.com/uploads/1/3/4/3/134363993/31959975c50d3.pdfIn PDF document text
    • http://vizionsmc.net/physics_for_scientists_and_engineers_10th_edition_by_serway_and_jewettnsnu2.pdfIn PDF document text
    • http://koburokigijufu.iblogger.org/test_riesgo_cardiovascular.pdfIn PDF document text
    • http://zowefokixot.iblogger.org/animal_cartoon_movies_in_tamil.pdfIn PDF document text
    • http://dulexip.22web.org/pulagorolozumewefezesujik.pdfIn PDF document text
    • http://roskycnmx.com/financial_accounting_books74d8x.pdfIn PDF document text
    • https://vosumizajemuji.weebly.com/uploads/1/3/4/0/134041682/xurotiveni_sujoberurebu_rujuvo_pamupudelekidup.pdfIn PDF document text
    • https://zukusabaxiwig.weebly.com/uploads/1/3/4/0/134000387/momefikiraludanu.pdfIn PDF document text
    • https://seboneluwisog.weebly.com/uploads/1/3/4/3/134368334/8723411.pdfIn PDF document text
    • http://avtoshkola-region26.ru/husqvarna_sewing_machines_partstwflm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kagokonutuvep.epizy.com/thank_you_lord_quotes_for_having_a_baby.pdfIn PDF document text
    • http://nudobuz.rf.gd/agility_workouts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e1efb82-e82f-4daa-a7a2-4a773cdf4b1a/tom_clancys_the_division_2_steam_release.pdfIn PDF document text
    • http://lubesugoninop.epizy.com/osrs_dagannoth_king_solo_guide.pdfIn PDF document text
    • http://xarigezosuwa.rf.gd/audio_technica_lp120_stylus_upgrade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f4fb116-d192-435c-9570-546b785a65d6/nerimezifofuvexa.pdfIn PDF document text
    • http://lodajozaki.rf.gd/valoracion_apgar.pdfIn PDF document text
    • http://gawusozuf.epizy.com/nuravepafopufapoliborofe.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_off0000f3f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F9 5344 bytes
SHA-256: b0b89ad87aed2c44cf896128c62f68bf854c5404e0487236ed146e4ae2d068ef
font_01_sfnt_off00010631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10631 10488 bytes
SHA-256: eadbe91e53bf976707e210848f9693baecc211bf118789e6540bc593c28ec0c0