Malicious PDF — malware analysis report

Static analysis result for SHA-256 13fc32d86317410e…

MALICIOUS

PDF

76.7 KB Created: 2021-04-08 05:51:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6b61b3f649e75eec90869558d41bd20 SHA-1: d7492cfca94cf8e61160d347ccb79f46feedf856 SHA-256: 13fc32d86317410ee072997d074783d0fe7dd64257d30c4bc45b61a85931bbf5
126 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, with a critical heuristic flagging it as a link farm on disposable hosting. The document body, though heavily obfuscated, suggests a lure related to educational content ('passive and active transport worksheet'). The presence of multiple external links points towards an attempt to redirect users to potentially harmful websites or to manipulate search engine results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://resalured.ru/wix?keyword=passive+and+active+transport+worksheet
    • https://vokarojunez.weebly.com/uploads/1/3/2/6/132696330/c8968a8f.pdf
    • http://vitodibiwanezej.mypressonline.com/53474030452.pdf
    • http://rozujed.sportsontheweb.net/the_barefoot_investor_reddit.pdf
    • https://cdn.sqhk.co/fukonovum/hdheigH/un_sustainable_development_goals_2030_agenda.pdf
    • https://tupeduwexawagov.weebly.com/uploads/1/3/1/6/131607208/zobofetob_buvobi_lijuxepademixu.pdf
    • https://taxufutusa.weebly.com/uploads/1/3/4/5/134514166/9c14b8b7ba933b.pdf
    • http://sikakapu.medianewsonline.com/acknowledgement_for_internship_project_report.pdf
    • http://futajef.medianewsonline.com/english_story_for_beginners.pdf
    • https://pidilamobojuri.weebly.com/uploads/1/3/5/3/135310388/2695156.pdf
    • https://rebazizezasij.weebly.com/uploads/1/3/4/5/134586802/9262397.pdf
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/5e0f346e80098.pdf
    • http://siwupojotuj.getenjoyment.net/41862526173.pdf
    • http://povisowalikim.scienceontheweb.net/cardiopulmonary_bypass_principles_and_practice_4th_edition_free_download.pdf
    • http://retamos.mygamesonline.org/pdf_alternator_manual.pdf
    • https://mateboxabivof.weebly.com/uploads/1/3/4/7/134763458/ab49c231c3a69c.pdf
    • https://cdn.sqhk.co/mojupesonon/ndkhhcc/coco_ice_princess_game_download_for_pc.pdf
    • http://motozed.scienceontheweb.net/63229140946.pdf
    • http://jadogaxarabu.mygamesonline.org/pageru.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tuwutexo.onlinewebshop.net/why_does_my_smoke_detector_have_a_green_light.pdf
    • http://madepadejatutof.onlinewebshop.net/acretismo_placentario_ecografia.pdf
    • http://gidubabe.myartsonline.com/siwedogorojuwekojix.pdf
    • http://motuvogipe.onlinewebshop.net/banking_awareness_questions_for_bank_exams.pdf
    • http://sagoralezerelo.onlinewebshop.net/bodmas_questions_for_grade_6.pdf
    • http://sulorowanutabu.atwebpages.com/carlota_perez.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efea.bin
1981b187e7b1e204daddaed879f54bed5d11cb296c4b0a9f0604601e980d4429		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEA 5348 bytes
font_01_sfnt_off0001022b.bin
8e851c604e52856b58f13611d85b58117c83845f1d13271dc5c67868a232de39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1022B 10396 bytes

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