Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b1807f5a30aed4e…

MALICIOUS

PDF

79.5 KB Created: 2021-03-08 08:29:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 36cc84647da4db4dc4758ac183b754ae SHA-1: 2e5daeb6bafdc0aa9d94121e036ab1017d23ec8f SHA-256: 3b1807f5a30aed4eb335fc7c243df520e18279f34da44273367b559d42c89dfa
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to deliver a malicious payload or redirect the user to a phishing site. The document body is heavily obfuscated, but the presence of the external URI is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://midufefew.ru/wix?keyword=do+elephants+migrate PDF link annotation
    • https://cdn.sqhk.co/zudoputasafe/jWijgif/67018199918.pdfIn PDF document text
    • http://potawuzaj.medianewsonline.com/85450128378.pdfIn PDF document text
    • http://subumobo.22web.org/37120619326.pdfIn PDF document text
    • https://cdn.sqhk.co/jesisoritet/8ayhsy1/78327980135.pdfIn PDF document text
    • https://cdn.sqhk.co/tokititagiwe/Seiaied/destiny_child_cater_to_you_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/29570762-e509-4c97-8ecc-b1591feb02c3/94888962272.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/draper_james_nashville_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76f172d4-59f9-4aa0-bf15-87c2514baca2/67608640910.pdfIn PDF document text
    • http://madepug.rf.gd/clash_royale_private_server.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/rezinewewivubanajisuwuv.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/sap_bpc_epm_10.pdfIn PDF document text
    • http://pekamidakoj.atwebpages.com/what_is_best_for_flexibility_yoga_or_pilates.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/giraffes_cant_dance_activities_preschool.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66204336-c1e1-4ff9-bd8e-2d84f9332c32/formulas_para_calcular_el_volumen_de_figuras_geometricas_regulares.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ee82edf-04d5-4bbc-af09-f9e5082bb4ec/75537809387.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3f91f69-4fe8-4baf-abdd-26199d102351/2005_chevy_malibu_starter_location.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/752e113e-30ff-43f1-acd0-a3a70c66595c/vikapojibelekirejawisupej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f2a616c-b766-49ec-b241-851bf1f6db2a/symbols_for_abigail_in_the_crucible.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/liverpool_vs_bayern_goals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aede808a-075c-47fc-a74e-d28319745ab1/febipuwukasolivenumus.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD09 5232 bytes
SHA-256: 1c2ffd6bfe94aea8031c1afcf9ebbc9ca78921b809b58e550d26c89ad3e4208c
font_01_sfnt_off00010eaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAF 10032 bytes
SHA-256: 3f99de439e8ebf8772e4d40fba3c16afd1849b709471dbdf1242412ccb73655b

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