Malicious PDF — malware analysis report

Static analysis result for SHA-256 390ee7d27b5a6057…

MALICIOUS

PDF

73.7 KB Created: 2020-11-23 21:41:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3c7d27a96668f89781a1e54c935a41ab SHA-1: b255185144af483983ac084ccb1b74fb4de21a09 SHA-256: 390ee7d27b5a60574c40b3204b094ae9e4bca7d3ad3eac388c4009f2e7d79c33
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains a large number of external links, with the primary suspicious URL being 'https://trafftec.ru/strik?utm_term=neverwinter+leadership+profession+le'. This pattern is often used to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://trafftec.ru/strik?utm_term=neverwinter+leadership+profession+le PDF link annotation
    • https://nawopudupavipe.weebly.com/uploads/1/3/4/8/134856820/c1ac49a43a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369633/normal_5f89a0b2c5045.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/rezareludufiven-voxodopi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408172/normal_5f970d854549d.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/kakifisuw-kuluke.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/guwutivupudutu/consumer_reports_safest_convertible_car_seat_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/057a7014-a613-4b84-b05d-3431098bc19d/first_steps_in_music_theory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04c49660-2b47-4869-8aa2-7c535212bae9/en_https_ais.usvisa-info.com_es-co.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a36b5dc1-98f4-49a0-80c4-db7f932e4764/1542150682.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/play_games_for_free_girls.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/snapchat_android_apk_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1bb26de-98c9-456b-bbf9-f8c8713384f8/sovuteleredodufarojipus.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_off0000e0f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F1 5252 bytes
SHA-256: 93fe1f9c61bdc99c82191e12ae702c5275746cb07c31b34870352f4c574386e2
font_01_sfnt_off0000f2e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E1 11644 bytes
SHA-256: db9cd7def134043da087cf9fb47adc041c977ca22302ea90730bf3fa252a7073

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