Malicious PDF — malware analysis report

Static analysis result for SHA-256 d94ee1151465c293…

MALICIOUS

PDF

66.9 KB Created: 2020-12-17 07:54:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: dfb23f71ce6a33a6c776c5771c1a4fad SHA-1: 92f795f8711bdd7aab5ebbccefd89bdd23b4b679 SHA-256: d94ee1151465c29362ad156158670354f6a658ab7cbbf693579e12d05bc8c09b
156 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 a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffset.ru/strik?utm_term=cheng+cheng+fan PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470678/normal_5fa90b2f3acea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391303/normal_5fa1baa6e5955.pdfIn PDF document text
    • https://fanapakukole.weebly.com/uploads/1/3/4/7/134756501/98a277.pdfIn PDF document text
    • https://vixijusodu.weebly.com/uploads/1/3/0/7/130776714/24cde8a7b.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/naranofinovujix/xovidelejenolonepifazawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa260424-b3e5-4ba1-b69d-c72f05ffbed2/2692357712.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39868f53-d011-4803-9f4b-b5e088fb7e2e/paroles_sublime_et_silence_julien_dor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48122eaf-3cb3-4553-9dd2-aaeb8edd580f/3194534353.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/vidmate_ing_karne_wala_apps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99ebc084-80db-4caa-bb2a-bbe630675df9/neverwinter_nights_beginners_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/arbeitszeugnis_formulierungen_schweiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e7915d1-af53-4e2b-860c-afcc799a23e2/resolver_sistemas_de_ecuaciones_matriciales_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75a48ced-5b33-428f-8844-179c1711f10c/36069996519.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/328d4c21-3cc0-4c9d-9785-954b2e56ce29/intervalos_y_semirrectas_ejercicios.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000caeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAEB 4744 bytes
SHA-256: f625c310867fa6a8a9fd1abc1fe39e33a6edf2e506bb367ed5a270af029e3255
font_01_sfnt_off0000db1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1A 10068 bytes
SHA-256: 6e34467abe0b834d7604b331613892269432bce4b387c649ba3dea8cde85ac0c

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