Malicious PDF — malware analysis report

Static analysis result for SHA-256 52bb6ad98f60ce65…

MALICIOUS

PDF

101.1 KB Created: 2021-03-17 22:44:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: c8334ff45d38e08b47af1f55fc04a1a8 SHA-1: c8c5df5d45983bcdc20955ed6237e47f8edec25b SHA-256: 52bb6ad98f60ce652851c609df2892907f80006614eedd20f5f7b75dd236e025
156 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which are to potentially malicious domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 5

  • 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.
  • 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://ponafet.ru/strik?utm_term=japanese+graded+readers+pdf PDF link annotation
    • https://ralufuluwifo.weebly.com/uploads/1/3/0/9/130969066/f6611f91d486.pdfIn PDF document text
    • https://lumabejisojexu.weebly.com/uploads/1/3/1/4/131455378/b279971e.pdfIn PDF document text
    • https://sugovodeko.weebly.com/uploads/1/3/2/6/132681033/9da743d8db59351.pdfIn PDF document text
    • https://muvusawit.weebly.com/uploads/1/3/5/3/135392745/05ed4cea41c48.pdfIn PDF document text
    • http://sizuxofutitarax.mypressonline.com/crock_pot_smart_pot_7_quart.pdfIn PDF document text
    • http://summ-ita.space/blue_book_used_cars_for_salem0xtx.pdfIn PDF document text
    • http://suvuxivenorum.mypressonline.com/roraxivepudanopizuk.pdfIn PDF document text
    • http://bazunujovi.scienceontheweb.net/vipotijireziravidof.pdfIn PDF document text
    • http://mists.space/94584102651drgmw.pdfIn PDF document text
    • https://kiwiwutirove.weebly.com/uploads/1/3/4/7/134707888/3972983.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/dilukilividodoxonobud.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/79223973088.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/how_to_write_a_latino_character.pdfIn PDF document text
    • https://cb47f074-0476-4434-b381-5672a365cab8.filesusr.com/ugd/c46c8a_9066428d9e4f4c22a126a2da0e8ed7b3.pdf?index=trueIn PDF document text
    • https://9afb1793-bc57-4514-bb46-74e980466609.filesusr.com/ugd/11f207_f3c0cf9e4dad484da908b6be7ebf0cf3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/casio_5081_ga-100cg.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/best_acoustic_cover_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/19170090336.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/52614873585.pdfIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/49862338307.pdfIn PDF document text
    • http://zegetafirotazaz.atwebpages.com/calories_in_arbys_sweet_potato_waffle_fries.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/biriyani_telugu_full_movie.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA27 19456 bytes
SHA-256: 4bc36831ee61462483ab4bdf5d1dbfb8e5907ad489f0213bed83bc948a258b65
font_01_sfnt_off0001377e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1377E 5164 bytes
SHA-256: 53da3ec3c53153bb20a3be0c08144b17c9001c11fd1654d3a0d59fc410b63ebf
font_02_sfnt_off0001491d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1491D 11692 bytes
SHA-256: 59febfe6be50b67a742a9182523d55889718e633ef2636620b5bad405fc7e183
font_03_sfnt_off0001713a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1713A 16100 bytes
SHA-256: 513236b56cd24d18f1916a542380e1656fe596eca6e14df5516133ff488da9f9

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