Malicious PDF — malware analysis report

Static analysis result for SHA-256 2787ec2e8b099bff…

MALICIOUS

PDF

85.8 KB Created: 2021-03-24 06:13:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 051476df60dcc9111b23910e2b4db7ae SHA-1: 17904125d77be52fb1bfa262a104c4c6b388e81d SHA-256: 2787ec2e8b099bff2a5fba0c5c339ca29d35c8f75786bb00c5bcfb46a75488f6
186 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, containing numerous external links, many of which point to disposable hosting. The document's content, though heavily obfuscated, suggests a lure related to 'learning disabilities book pdf' to encourage users to click these links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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 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://kuzutuzo.ru/award?keyword=learning+disabilities+book+pdf PDF link annotation
    • https://rimofunoduw.weebly.com/uploads/1/3/4/5/134525219/femajow.pdfIn PDF document text
    • https://wagidojinubem.weebly.com/uploads/1/3/1/4/131438567/b14fb461.pdfIn PDF document text
    • https://senovaxevuka.weebly.com/uploads/1/3/5/3/135304629/gojavilonovide.pdfIn PDF document text
    • http://duwelizub.mywebcommunity.org/vifapopuz.pdfIn PDF document text
    • https://kuxaxamolexude.weebly.com/uploads/1/3/4/8/134869233/ed428fed.pdfIn PDF document text
    • https://wexotagupoma.weebly.com/uploads/1/3/2/8/132814474/zobud_wivebewivir_fupewexuzasup_mowamirusixif.pdfIn PDF document text
    • http://bexukavinawexov.mygamesonline.org/babafowopijo.pdfIn PDF document text
    • http://setenilezodad.iblogger.org/memojenavogano.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://96a9e3af-f0c3-4048-9e6c-0ad8da3c6018.filesusr.com/ugd/15d534_fce5f4d046ad44c88e51e9870ace729d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/927ca76e-ef2c-4919-857c-fd2cdb6ff56e/how_to_put_ink_in_a_hp_officejet_pro_8620.pdfIn PDF document text
    • http://xabuvale.epizy.com/architectural_styles_in_software_engineering.pdfIn PDF document text
    • https://7031c68c-cf47-488c-b9bd-b344696616f5.filesusr.com/ugd/51e9e9_2b6492ff572744099031ccc418411116.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fa32f9d-1d3e-4c19-8805-913af48e578a/66955068449.pdfIn PDF document text
    • http://bejopirobi.epizy.com/84440860868.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4dbc840-a8d9-4da1-886d-419541addb8c/zurebadifa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6b8bd10-2bb8-44e5-8cfa-ef9e092359bf/wiwapobazemirep.pdfIn PDF document text
    • https://6f12065f-c45d-410c-b048-6ec23fb2b810.filesusr.com/ugd/02ccf7_640dc75452ec40c6a8085cedf8715a1c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfd91596-2394-473b-8e8c-11458eb12642/fenapezugagik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/724bed33-a673-4f03-8556-dcc1eedd64af/death_note_2015_movie_trailer_reaction.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fab0a58-0dc0-4c18-b45f-56784a33af56/burger_king_nutrition_crispy_chicken_sandwich.pdfIn PDF document text
    • http://mukukukeban.rf.gd/how_to_use_blender_2._79.pdfIn PDF document text
    • http://wesonujojamoga.epizy.com/baby_driver_tamil_full_movie_filmyzilla.pdfIn PDF document text
    • https://2ddc7431-ff91-46e9-9708-195efd6cc195.filesusr.com/ugd/ffe0d3_79ceaf7d59c341f6bef594475674c554.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10212 4392 bytes
SHA-256: 3608f3e396cd63c97cfe4bc51d3a12d828f49aa63c36e6d54d92e781ae2e4029
font_01_sfnt_off00011193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11193 5356 bytes
SHA-256: 2d9625ead15ae71e22712edbf878a7d746dfdfda364f512b521302a65231fa48
font_02_sfnt_off000123d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123D3 11012 bytes
SHA-256: 8b3125cb1726af2621f145aa9e840a34e7d46adf1526d9e53fbc4a800de05528

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