Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb7abae601bd3d08…

MALICIOUS

PDF

76.4 KB Created: 2021-02-28 07:41:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 691051c60c9f148ee851c825cf25c2a9 SHA-1: 16a769d57eb612f9b1a155abf37127e12afaa6d1 SHA-256: eb7abae601bd3d0844b6005378c95064b9c90431e6cf2915e34f0bf5ec67fc5f
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://jottigo.ru/aws?utm_term=python+dict+get+key+from+value PDF link annotation
    • http://nogurufegu.mygamesonline.org/ohio_state_university_medical_center_map.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455914/normal_5fdb3deb49b92.pdfIn PDF document text
    • https://jewevugaxezi.weebly.com/uploads/1/3/5/9/135967143/povejejiloruki.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452374/normal_5fe2f57aaa2d5.pdfIn PDF document text
    • http://kapusta.pro/whats_extended_metaphor_meanrkadi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483623/normal_5fca8046ddfdc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458150/normal_602f99ecf1663.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408174/normal_5ffaa92c7c72a.pdfIn PDF document text
    • http://ketaton.mywebcommunity.org/hec_hms_vs_hec_ras.pdfIn PDF document text
    • http://taforojujutusig.mygamesonline.org/descargar_musica_anthony_santo_en_vivo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489054/normal_5fce6ed317341.pdfIn PDF document text
    • http://likedizar.medianewsonline.com/woxinedurul.pdfIn PDF document text
    • http://tebapewulodafe.getenjoyment.net/fairy_tales_anime_season_1.pdfIn PDF document text
    • https://baputopozim.weebly.com/uploads/1/3/5/3/135336161/2933703.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410722/normal_5fd03ff17a73c.pdfIn PDF document text
    • http://scm03.ru/snapseed_photo_editing_app_for_laptopojh9b.pdfIn PDF document text
    • https://kikurebimeko.weebly.com/uploads/1/3/0/8/130814200/a44f1a.pdfIn PDF document text
    • http://upsbox.ru/14110896955ztbp4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450037/normal_602d2c27054ee.pdfIn PDF document text
    • http://agent-spv.space/63089667188etsqn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000eb2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2E 5484 bytes
SHA-256: a7e06229e8610648bc24a311ff9422d257514464fc24769119925753e20c24dd
font_01_sfnt_off0000fdbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBF 11192 bytes
SHA-256: 323fe13a325970aa4b8d9ec510aed04fb76d3c0c88e10526dcb5d4d784ae9be3

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