Malicious PDF — malware analysis report

Static analysis result for SHA-256 57d746e703789826…

MALICIOUS

PDF

90.2 KB Created: 2021-03-14 13:51:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed6cd056c8478b9cd70da18fa0ad748f SHA-1: ee6b19015c1e0086c792915719c9ce8b516053c7 SHA-256: 57d746e703789826eb1c633d039dc5cd1991a72fa2cfca58f59d183a06863dfa
126 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 and an ML classifier, indicating malicious intent. The document contains numerous embedded URLs that point to disposable domains, suggesting a link farm or phishing operation. The presence of external URIs and the overall structure strongly suggest this PDF is designed to redirect users to malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://lozipotod.ru/wix?keyword=wandoujia+english+apk
    • http://katipef.medianewsonline.com/8599068925.pdf
    • http://biwiroxefamir.mywebcommunity.org/how_to_use_a_rainbow_se_vacuum.pdf
    • http://copyrightsupporteds.com/salary_of_aircraft_maintenance_engineer_in_air_indiacjbhb.pdf
    • http://fodelogutejamit.getenjoyment.net/analgesia_in_labour.pdf
    • https://cdn.sqhk.co/bozajapema/hcFqcjc/ligase_chain_reaction_simple_definition.pdf
    • http://numulul.mygamesonline.org/biziwemabedexej.pdf
    • http://lumufurisazela.mywebcommunity.org/search_bar_google_chrome_delete.pdf
    • http://batmbatm.ru/naruto_shippuden_3_temporada_dublado_download_utorrentuotrp.pdf
    • http://wezenilokiwuv.iblogger.org/report_anti_social_behaviour_council.pdf
    • http://favarorul.iblogger.org/70533945542.pdf
    • https://cdn.sqhk.co/gofelaxes/Vieica5/99869230239.pdf
    • https://cdn.sqhk.co/jurugaguvedu/pieAgid/76555794796.pdf
    • http://basvuruizleme.online/how_to_determine_number_of_atoms_in_a_formulaei9yr.pdf
    • http://interstart.online/lagu_sunda_bungsu_bandung_dasar_jodowvuav.pdf
    • http://hd-cam-mirror-up1.club/16497042819wa3qo.pdf
    • https://cdn.sqhk.co/daladovum/hkhgpjg/who_won_the_arena_football_league_championship.pdf
    • http://igcopyrightforhelps.com/xaloratofimuvuu05.pdf
    • http://lessonsonline.site/tedidujovebosagoq722l.pdf
    • http://ziwusis.getenjoyment.net/bajaj_ceiling_fans_catalogue.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://luvabokinoleg.onlinewebshop.net/82028505654.pdf
    • http://movuzawizigevej.myartsonline.com/48049433953.pdf
    • http://rodisasedozax.myartsonline.com/47351934670.pdf
    • http://vokunewegulu.epizy.com/gajeridebadesogona.pdf
    • http://satogitexuvo.myartsonline.com/6133279365.pdf
    • http://fuvituze.epizy.com/epcrs_catalogue.pdf
    • http://revipopeguxasaf.epizy.com/el_almohadon_de_plumas_descargar.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3f0.bin
86b873d6fd4146db97301c2c8a2677ef7d42d78aea9bfd5b61fdf42c73fef70d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F0 5080 bytes
font_01_sfnt_off00010530.bin
7cd81da48aaa6dd7e8de027d154c3cac54cc15e3509c2da48772097502d580e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10530 2096 bytes
font_02_sfnt_off00010ec8.bin
c01643803b1afcc2ace811bd092767888acfe8eb9a4b0328c73412ce42fa9316		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC8 11240 bytes
font_03_sfnt_off00013558.bin
aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13558 16312 bytes
font_04_sfnt_off00014ae4.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14AE4 4324 bytes

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