Malicious PDF — malware analysis report

Static analysis result for SHA-256 76dd9e390b16b4fc…

MALICIOUS

PDF

75.4 KB Created: 2020-11-25 11:32:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4c5299a1b77304c9f8989ad88338a9a0 SHA-1: ed497411b17d0324ad0ef55299640e114d6ade28 SHA-256: 76dd9e390b16b4fcbaf017c55b4cd7ab55990271e574918ae0346dc9c071ebad
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. ClamAV and ML classifiers flagged this PDF as malicious, indicating a high probability of malicious intent. The presence of an external URI and the ML classification strongly suggest a phishing attack pattern.

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://trafffi.ru/strik?utm_term=unblocked+games+99+for+school PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448558/normal_5fab1764e8ffb.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/0898edc5-fadf-4073-8b2b-80470eb9c830/93479144713.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f58eccb8-512e-4486-a76b-449bc9ec868a/unit_3_resource_book_mcdougal_littel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0f7b7e4-1d95-4e8b-a0c0-724a022d1d4f/xumugojegidukadukukir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f9640f1-1338-4e20-9294-a11a73e9c096/tugefitedetudexilusa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8685a327-2b1e-49af-84fd-a2f6818a296a/penejotobulugi.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/whatsapp_apk_mirror_2._17_351.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de63c0b2-26fd-417d-89c8-37a39482f278/dupage_county_lisle_township_assessor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46c546d7-3080-4dfe-b873-f5b0b7fdec3c/troy_bilt_tiller_manual_model_21d-655a766.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7821aaca-6ad1-4e1c-a6dc-5efb70ff1efd/94415893859.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7baccd0-8188-41d5-a4b0-f0f5bb45f08b/bobolib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a4acf7f-3d21-4fa9-8c2c-0b706b6e45b4/mizixuwiroxevur.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/folabuzin.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/report_bounced_cheque_abu_dhabi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/914c0a6f-d777-4878-a724-d2e70596c530/nifefopidejo.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_off0000e869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE869 5784 bytes
SHA-256: 8105e42f78f7a1aeb92b2f563c3c6d69276f47e7bae1bd2a9f395e2a298771c9
font_01_sfnt_off0000fbed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBED 10640 bytes
SHA-256: 84821f99385814b9706feeb4a9be489f3c667982b9fc99d1413f761486708a78

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