Malicious PDF — malware analysis report

Static analysis result for SHA-256 81dbac8758600c6e…

MALICIOUS

PDF

71.0 KB Created: 2020-12-24 07:04:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0b26d7d96c70bcc09aa8a15d41583f37 SHA-1: 29dc992b59fef1f7178a7ff0dd26e26866081973 SHA-256: 81dbac8758600c6ea0da8dc5a9a700c5f2bc81e904fa0d98ecdb93cdd007146b
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffnew.ru/aws?utm_term=bejeweled+blitz++for+pc PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369505/normal_5fdd888478773.pdfIn PDF document text
    • https://xopaluwejur.weebly.com/uploads/1/3/1/8/131857284/roronuxibekazaf-jobetilatabelur-xakolu.pdfIn PDF document text
    • https://laverikiwife.weebly.com/uploads/1/3/4/5/134502667/4004344.pdfIn PDF document text
    • https://rakamukomegu.weebly.com/uploads/1/3/2/6/132681656/lezukozikiwinenirib.pdfIn PDF document text
    • https://regifevadep.weebly.com/uploads/1/3/4/4/134476302/gekowudebul-datepide.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/mexijegedakol/sophos_authentication_client.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/arabic_keyboard_16.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/global_pet_food_outlet_sepulveda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/638a5f1e-5f80-424f-ab09-6a67723a414b/how_to_zoom_out_on_chromebook.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_off0000da12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA12 5168 bytes
SHA-256: 7a74f5574bd884db45418f318b1b8daf82e7417e58905ca11e0f8189c8e402bf
font_01_sfnt_off0000ebd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD6 10548 bytes
SHA-256: 6631289bb6cc3867443c590b058838ca37fd1e5df69c88bdd6a11e142e1fc124

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