Malicious PDF — malware analysis report

Static analysis result for SHA-256 8636b17064f96913…

MALICIOUS

PDF

81.9 KB Created: 2021-03-23 06:26:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a5f6fc94362518c7be7d887522a72ad SHA-1: 827f80753d0288e2a016ab620165e956ca5c9a6e SHA-256: 8636b17064f969133ddbf9dca2af7c81010e1e9ed464c1a7cfe740c438304042
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search result for a popular book, likely as a lure to trick users into downloading malicious content. ClamAV detection and ML classification strongly indicate malicious intent, specifically a phishing or trojan distribution campaign. No scripts were extracted, but the presence of external URIs suggests a download or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://druttle.ru/wix?keyword=xanathar%2527s+guide+to+everything+pdf+free+5e
    • http://beamorem.com/75378185213a6q15.pdf
    • https://rifijilaguselud.weebly.com/uploads/1/3/4/8/134846829/391d1c1cbb42d81.pdf
    • http://all-host.site/what_does_a_logic_model_do51367.pdf
    • http://dodemawaj.iblogger.org/template_yemen_civil_war_map.pdf
    • https://static.s123-cdn-static.com/uploads/4448550/normal_5ff9eaa977a15.pdf
    • https://cdn-cms.f-static.net/uploads/4425005/normal_6032f3cecea69.pdf
    • http://fenuxove.22web.org/bescherelle_grammaire.pdf
    • https://cdn-cms.f-static.net/uploads/4387918/normal_60585d3a9b94f.pdf
    • https://jeduwisuduxib.weebly.com/uploads/1/3/1/4/131483356/xobezoz-wadekiroximozu.pdf
    • http://bt-management.website/95103111277tlwkr.pdf
    • http://4bochki.ru/94535533304kv6zm.pdf
    • https://cdn-cms.f-static.net/uploads/4426075/normal_6058a5d1de4be.pdf
    • https://cdn-cms.f-static.net/uploads/4394077/normal_604b388dc8329.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f2182bdb-ca8e-4fe7-b379-f84e14eeb57e.filesusr.com/ugd/026bcc_c79ed32ba441479e802756a51ba36d71.pdf?index=true
    • https://uploads.strikinglycdn.com/files/362247b9-e50a-4f34-a3d3-854a33566a69/tonafewaremegati.pdf
    • http://radopafoxewu.rf.gd/12092586876.pdf
    • http://nelipofamarul.epizy.com/22722328125.pdf
    • https://9fd063f5-a6e2-47f0-a1c8-15c646e36cc9.filesusr.com/ugd/ee11ea_6356299a071441deaf3a8a49ab1f7f21.pdf?index=true
    • https://bb74f61c-7045-47bf-9a7e-968101ee373e.filesusr.com/ugd/81ef4b_acf3cc2b6ce34aebb9da81e218af68f6.pdf?index=true
    • https://d17f4099-ecc1-42b1-9c73-51521793457c.filesusr.com/ugd/4a2613_659ac9111f734d9e8bbbeea4ad9021c3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/68395d01-066e-43b9-a3cb-d132402feeb2/fefofujisobo.pdf
    • http://vezapuro.rf.gd/12628396553.pdf
    • https://uploads.strikinglycdn.com/files/e169bc7c-1805-410f-b747-4fd8e9adc52c/30021654075.pdf
    • 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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee86.bin
2ce5a7286efefc5aae27ce1c31b3347e159d00bd30cf97f509a0b7f7d49caffb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE86 6440 bytes
font_01_sfnt_off0000fe7b.bin
41b6dae2015aecc142c507ecfb2fbc449ea4b50c00f30501914cd3b0370c50b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7B 5568 bytes
font_02_sfnt_off00011183.bin
0dcf78ed549540e59d0fba1d84230c165d17f036ea8659c143fec4193c49e3ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11183 11052 bytes

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