Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bd25635bb3bf0c2…

MALICIOUS

PDF

81.7 KB Created: 2021-03-20 22:31:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 00b7509963a5f9d7081d9c08db20e4cb SHA-1: 57b52ca289a710ca27c4f5c99932d88b4e11f10d SHA-256: 7bd25635bb3bf0c282c27ea45faab615abf3ab3407f6efb96d249c6c517f6288
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to suspicious domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'Mabel's guide to life', likely to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://resalured.ru/wix?keyword=mabel%2527s+guide+to+life+all+shorts PDF link annotation
    • http://nesobaka3.xyz/47328959119p9e5w.pdfIn PDF document text
    • https://cdn.sqhk.co/dapumexader/hj84ij0/resident_evil_3_remake_ps4.pdfIn PDF document text
    • http://fumexijana.getenjoyment.net/35450243.pdfIn PDF document text
    • http://carbackseat.site/descargar_appvn_apk_ios1pr2e.pdfIn PDF document text
    • https://cdn.sqhk.co/pepupiribojo/jg31Khh/homemade_werewolf_costume_ideas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401697/normal_6053159819105.pdfIn PDF document text
    • http://jadogaxarabu.mygamesonline.org/tafibenovopozire.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418963/normal_6055b6355da06.pdfIn PDF document text
    • https://cdn.sqhk.co/xivomojuf/a9jiXbV/metropolitan_theatres_santa_barbara.pdfIn PDF document text
    • http://vasakuso.sportsontheweb.net/85398458081.pdfIn PDF document text
    • https://cdn.sqhk.co/mozulunilex/hj21p9C/gizizuko.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416331/normal_5fca45de952e0.pdfIn PDF document text
    • http://xorimomupajo.scienceontheweb.net/4th_grade_math_diagnostic_test.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://19a39513-20cc-49d1-a75c-e30ce0314142.filesusr.com/ugd/f99735_cf98a33a5d9c440098e2ff5e5a54d9e8.pdf?index=trueIn PDF document text
    • https://e0220c8c-c322-4c33-af83-7c5b0fe00b66.filesusr.com/ugd/a771bd_59e49f99eaa0464a87eddb48f0f7fc91.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kofabube/savage_garden_greatest_hits.pdfIn PDF document text
    • https://03df18d0-0a94-4077-8b44-1f3cf8b7c870.filesusr.com/ugd/23a6c3_9fc81bb604914fcbbf38e3c5f3a5e3fa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dobesogum/18383261106.pdfIn PDF document text
    • https://91313464-3f42-441e-b0e8-b27065d471ad.filesusr.com/ugd/ee9d3f_11f75e9e6616463fb546ef756847fdec.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pusixa/30661393831.pdfIn PDF document text
    • http://vilatelisoto.onlinewebshop.net/nesosegadare.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6C 5348 bytes
SHA-256: 373d850ef1c02100631d12a3216b2b7a84fa7059a157ea174528c876912cf0ae
font_01_sfnt_off0000fca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA2 12116 bytes
SHA-256: b4ef57a4eeae3a08bbd69635c6b8a21bba606001cc8c2d1e3aff92d718f8c0ad
font_02_sfnt_off000124b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124B4 16036 bytes
SHA-256: 354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb

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