Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c0aa96d6377a07f…

MALICIOUS

PDF

77.1 KB Created: 2021-03-15 13:58:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73849bab83ae15641a5e8ffc49d1e397 SHA-1: 9392408c31c818696a7dd3e7fb66f3b433a5e380 SHA-256: 4c0aa96d6377a07fda9ad55027d9d8c2e8bc56d4befd423c2f81dafca54455d9
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that directs the user to a suspicious domain, likely for phishing or malware distribution. ClamAV detection and ML classification strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to academic search results, aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/award?keyword=similarities+between+angiosperms+and+gymnosperms+pdf
    • http://tofabukusakuni.22web.org/lagu_alffy_rev_sea_games.pdf
    • https://cdn-cms.f-static.net/uploads/4450638/normal_6013e0c4560e0.pdf
    • https://static.s123-cdn-static.com/uploads/4369919/normal_600753395490a.pdf
    • https://cdn-cms.f-static.net/uploads/4416671/normal_604b09d5e03a3.pdf
    • https://static.s123-cdn-static.com/uploads/4484363/normal_5fecad579d37c.pdf
    • https://static.s123-cdn-static.com/uploads/4385862/normal_5fedff4fea114.pdf
    • https://cdn.sqhk.co/gufezitaxato/GGGuDjf/58371757520.pdf
    • https://cdn-cms.f-static.net/uploads/4370266/normal_5fd8b2a2b3e08.pdf
    • https://cdn.sqhk.co/lepezusija/aNgfKia/ruxati.pdf
    • https://cdn-cms.f-static.net/uploads/4383321/normal_6026cbdf58dd6.pdf
    • https://static.s123-cdn-static.com/uploads/4391314/normal_5fe55e5bcb319.pdf
    • https://cdn-cms.f-static.net/uploads/4380072/normal_6031c26e2a391.pdf
    • https://static.s123-cdn-static.com/uploads/4496577/normal_5fcb2ce3cd2fd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zazelujeju/hatha_yoga_sequence_30_minutes.pdf
    • http://zamutuxagen.epizy.com/movoziwu.pdf
    • https://3d7304b5-8527-495f-b913-615d6f357a43.filesusr.com/ugd/ef7486_984445cc388c4233ac646921461c0f35.pdf?index=true
    • https://s3.amazonaws.com/jeduzizonox/hambriento_nach.pdf
    • https://146c8b6c-0b46-450b-8ed0-b45f1e2a4974.filesusr.com/ugd/b58d21_ed340b545d784268b401e79e1f8a80fc.pdf?index=true
    • https://s3.amazonaws.com/tinivukedeta/seferafafedoponiw.pdf
    • http://sokozivale.rf.gd/wiguwirewusotiluwedol.pdf
    • https://cfc603e6-7cd4-4c42-812b-9722deb80ae4.filesusr.com/ugd/0e9fc2_d909cd0ea13448058a2fbcf4a0530182.pdf?index=true
    • https://fea50346-ab34-4b67-843e-90a6383c4983.filesusr.com/ugd/bf678e_aee3cd1a12224e5e854abee9cc33766c.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee24.bin
446939a41555acfc5697223b0855de4f94254479d2baedaa366f2f9877989602		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE24 5800 bytes
font_01_sfnt_off000101d9.bin
643bef3dbe7090205687b814894fb92e51f4c0d15046b4b558d8f3f10345d1f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101D9 10780 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.