Malicious PDF — malware analysis report

Static analysis result for SHA-256 51a4b1e6aae882fd…

MALICIOUS

PDF

78.4 KB Created: 2021-03-14 12:18:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3605ac7b07b48b2237e1f4ce3b6d49b6 SHA-1: 58560d56afa097994748f462e3941a05860d4475 SHA-256: 51a4b1e6aae882fd93292d5ecd352ace538f6fc51fefc952a3cc4c9897028ce8
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to search queries, suggesting a lure to a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://xezojetit.ru/wix?keyword=half+marathon+january+2020+florida
    • https://cdn.sqhk.co/xivovido/OhgNWhW/3937002690.pdf
    • https://static.s123-cdn-static.com/uploads/4450040/normal_5ff0cdbd59121.pdf
    • https://cdn-cms.f-static.net/uploads/4464521/normal_603f52540cd88.pdf
    • https://static.s123-cdn-static.com/uploads/4407986/normal_5ffca3131a806.pdf
    • http://topuniversityru.fun/bajrang_dal_logo_hd_wallpaperjr4dt.pdf
    • http://2gusevshop.space/wokisetejarumoi063x.pdf
    • http://accueilcmb.com/51385932584cyu8s.pdf
    • https://cdn.sqhk.co/gojelonub/jgoycfM/furia_de_titas_2_assistir_online.pdf
    • https://cdn.sqhk.co/lisakopew/highjUS/airbnb_ipo_price_estimate.pdf
    • http://ijmalan.xyz/conair_weight_watchers_body_analysis_scale_manual7ppci.pdf
    • https://cdn.sqhk.co/nezafomura/y8ghGjf/56325995239.pdf
    • https://cdn-cms.f-static.net/uploads/4383802/normal_602a565fe4819.pdf
    • http://vkrowl.com/detarebfdwb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/776a0d76-8147-4493-ba61-0b1fc0ce5e44/metabofi.pdf
    • https://uploads.strikinglycdn.com/files/924dbd0c-f4ca-4b0f-82cd-5f325894d65c/the_narrative_life_of_frederick_douglass_chapter_10_summary.pdf
    • https://39c1d623-eccb-4af0-a86a-15328a2d61f9.filesusr.com/ugd/3cb6cb_dcb0136211df467486b226c2c89d4aab.pdf?index=true
    • https://8a833fea-7c9a-4d2e-a5a7-d3590f42a3e5.filesusr.com/ugd/9aab09_a07448650f95407a84def8bc25e899b1.pdf?index=true
    • https://c8d0f166-86fd-441b-8df5-aa5e6c6c7644.filesusr.com/ugd/f4b3af_b32dab584c05437c84db80b0ef1bdd8e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/58c3957e-aa43-4318-b28f-25b471d295bd/1001_netflix_error.pdf
    • https://eac5c218-d238-408c-98a6-8ff0ecbb25fc.filesusr.com/ugd/b1277d_be65c4f03d154d4daae753ac19d1eb0c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f2b8acb3-a2ff-4aaf-a05d-62122e9c6728/wamonibesopomadugilavib.pdf
    • https://51f47fa2-20f7-4ec4-bb91-8ae4aee689b4.filesusr.com/ugd/917232_20de1cb0d54d417d912ed31d882640d9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/6d1c0e4d-f472-404e-a137-babb3b9f5e5c/dusux.pdf
    • https://36425c1f-c329-48aa-845d-1f8252cb45c8.filesusr.com/ugd/01d500_d66dfcab6e99402ab810a816606a203c.pdf?index=true
    • https://30de3caf-c510-4ce9-8691-b8280dc60d9b.filesusr.com/ugd/4980ee_c5eeec070f98401293f4e7ad6c188190.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e723.bin
51f3ef1e254f5299773b9ac73423ae451c838bbe0eea4adfa13c2327b502383d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE723 5144 bytes
font_01_sfnt_off0000f876.bin
2f3cb6069b8ff38fa0e244171245b69b7256ea3ea6ad168a3c39feade61c889e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF876 11032 bytes
font_02_sfnt_off00011e01.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E01 4324 bytes

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