Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a2a3ffdb88cdb29…

MALICIOUS

PDF

133.0 KB Created: 2021-05-20 02:58:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: c152507e5c0a64f7618e3dfaa6fe057f SHA-1: 2d9ec6c8f2927315e650a0246ddc136bfdc07fd3 SHA-256: 5a2a3ffdb88cdb29734249c161cefb02bd5ce76f30c5af33df3f144fd034f89b
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that leads to a domain associated with malicious activity, disguised as a free download for a project. The presence of this URL and the malware detection strongly suggest a phishing or scam attack aimed at tricking users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/strik?utm_term=full+wave+bridge+rectifier+project+class+12+pdf+free+download PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fae831d6-5eaf-439a-a20c-a1a4bea7e8aa/maxi_cosi_pria_70_weight_limit.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/2010_chevrolet_camaro_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/list_of_all_irregular_preterite_verbs_in_spanish.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/47316986894.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/definition_of_mitotic_phase.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/54048364838.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46bbcba0-bdef-48bd-b73e-d0240516fdcc/how_to_use_lg_convection_microwave_oven_for_baking_cake.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/14254870916.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/83747501372.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/baae0dfa-0701-48e6-80e5-d29df9652d01/zagolixuvazujujoku.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/nalopinutapisujoz.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/gokomel.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/bilunamowamabu.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/vatiburilusakobi.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/5411778552.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/dimug.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/best_smelling_laundry_detergent_for_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/best_way_to_learn_basic_electronics.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ae10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE10 5828 bytes
SHA-256: bfe3f8a6d064f2862f5a3b464f23afbcf8210903a7c4185e56faa7c6d9f8a253
font_01_sfnt_off0001c21d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C21D 13280 bytes
SHA-256: ee15fa68974e6d69713aa47e79e98d34db4e5dd63efdcfce4ba098077ed80a16
font_02_sfnt_off0001ef79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EF79 16432 bytes
SHA-256: 5ab9f922af996b4c9dbd4c3dc7d23747822da1222bc7b3afcf757d5ce4f0623d

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