Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8b09f8ec2ced98e…

MALICIOUS

PDF

88.2 KB Created: 2021-03-17 03:10:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 841225b286ca700d2cf2733a361972b9 SHA-1: 3ccbc313310022b3c719a9a17ddeaca07b5390fe SHA-256: b8b09f8ec2ced98eba54696ff92c1ed3b317c40cd2316251e4619ddfb16da5f3
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://crophysi.ru/wix?keyword=osrs+f2p+cooking+guide+1-99 PDF link annotation
    • https://cdn.sqhk.co/juvowisire/hg6TwdS/slendrina_the_school_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/doburazax/VShcjaS/pemikudebu.pdfIn PDF document text
    • https://cdn.sqhk.co/bijozugetav/jbiahjB/hd_camera_for_android_pro_apk_1._5.pdfIn PDF document text
    • https://cdn.sqhk.co/dijabidasu/LqijLUi/vidawipopijumasi.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/e9a1790e-dbcc-424f-80d2-2517b42beb3c/journal_of_international_development_impact_factor.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/51727197102.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/42528124735.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/9734804689.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38fac896-ba8f-4b0a-99cb-d1387fe29db0/3682432242.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/73495533823.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/backtrack_iso_for_vmware.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/citing_a_website_article_apa_format.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/calculate_the_lattice_energy_of_kcl.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/apps_outside_apple_store.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/forest_biometry.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/lewolidajonivamedilifapow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4698605f-3d83-4661-b66e-396483a25859/what_is_active_listening_in_call_center.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/widakada.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/92922557953.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/60316752947.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011cc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC4 5544 bytes
SHA-256: 237828ce639513967f75fed68ac6b6f9a40da1f934645b603c1bcc09af665477
font_01_sfnt_off00012fc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC5 10448 bytes
SHA-256: 0ca0fb5bb186fc4b9e509cd891e9f5b7c63de752a24ee052ee352ec491669667

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