Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd4284b84a435591…

MALICIOUS

PDF

84.8 KB Created: 2021-03-20 07:09:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 07057ca3578b01618c0d90d6c24f31a6 SHA-1: 07f284d87fc302498a13793e900ecaa762e1cf7e SHA-256: dd4284b84a435591d1a604a1bc5a76f3d26dfe94387de83da7ff775d8e012b2d
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one identified as part of a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs and the overall structure point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://leonvi.ru/strik?utm_term=what+does+the+moonlight+man+say+in+gerald%2527s+game PDF link annotation
    • http://sberbank.services/l_anorexie_mentale5gf3h.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375541/normal_600a8f51276d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468540/normal_600ddb20ad5bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448724/normal_5ff82f0f233fe.pdfIn PDF document text
    • http://tiktoktop.design/apple_tv_3rd_generation_jailbreak_appsm87s2.pdfIn PDF document text
    • http://kudusakepupa.sportsontheweb.net/digital_design_and_computer_architecture_github.pdfIn PDF document text
    • http://fit-italy.space/830193966667j0i8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465905/normal_5ff148ea6d9a2.pdfIn PDF document text
    • http://gamukanemafutu.mywebcommunity.org/bidojarukaduvunorijimev.pdfIn PDF document text
    • http://kiwenalod.medianewsonline.com/kupididukafezopuwibekule.pdfIn PDF document text
    • http://pojapusevipuzu.mypressonline.com/netgear_gs108e-300pes_link_aggregation.pdfIn PDF document text
    • http://desokore.medianewsonline.com/81610483333.pdfIn PDF document text
    • http://a-trvl.ru/everstar_air_conditioner_manualrze8h.pdfIn PDF document text
    • http://vostokzapad.su/the_power_of_a_praying_husband_book_of_prayerstc5gp.pdfIn PDF document text
    • http://reveruverof.medianewsonline.com/norudisupapufobubafak.pdfIn PDF document text
    • http://lukisasore.mywebcommunity.org/briscola_regole.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377642/normal_5fd66b6258065.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e22e8d81-f41f-4d51-abb1-39b19d2d32bb.filesusr.com/ugd/96bf9d_f217b9e692114800a48e4ef9441125c6.pdf?index=trueIn PDF document text
    • http://fadakivok.rf.gd/wd_my_cloud_home_duo_manual.pdfIn PDF document text
    • http://besafetusupug.atwebpages.com/mitowudepivesezewuxase.pdfIn PDF document text
    • http://xuzupazona.epizy.com/diagnostico_glioblastoma_multiforme.pdfIn PDF document text
    • https://451cdc1f-766e-44a1-8a9d-f9db2ecad5ed.filesusr.com/ugd/0f0d48_b2b840df8ffe4abbb343a2a7e1e59e01.pdf?index=trueIn PDF document text
    • https://02314edc-d025-420b-9d62-795437f25c47.filesusr.com/ugd/4f0fc1_f9444bb6a7cf442786e24aa7069e25f2.pdf?index=trueIn PDF document text
    • http://gonegexunu.myartsonline.com/porukokavufis.pdfIn PDF document text
    • http://vaterojot.epizy.com/bepovowogazosiravizavok.pdfIn PDF document text
    • http://faxiruvud.myartsonline.com/44605629415.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_off00010c44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C44 5388 bytes
SHA-256: e03de3e42650a489a05bd29fa38b2b0360824a50ea1c74c8c5b922c8b48c0c21
font_01_sfnt_off00011e84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E84 11328 bytes
SHA-256: 9dd7b1fa87519b843e2cf3f5143eda4fc6c556cf67a2b660bc516f73440551b6