Malicious PDF — malware analysis report

Static analysis result for SHA-256 8157d9b257f227ca…

MALICIOUS

PDF

71.2 KB Created: 2020-11-28 06:39:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: a0dfb418ac2278b5d79eb03ee68693eb SHA-1: ded585ef334dcbf76f4b5b5fea5a9de2e06aab7c SHA-256: 8157d9b257f227caa773a7bb6b8cb94a003bc565d5973464c9b87846f15c4ec3
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://traffnew.ru/123?utm_term=broward+school+calendar+2020 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384463/normal_5f8d451a365f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451945/normal_5f9ecac6691ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421360/normal_5faae17e759e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405674/normal_5fba8c0e53e38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368741/normal_5fb47bcf7e867.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419642/normal_5fa8e044c1795.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450147/normal_5fa6797cb5ad1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495399/normal_5fb28f688f1da.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fajixe/5_dvd_changer_player.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6248dc65-e062-48be-b642-a0c93673cbbc/5861197485.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/16514648352.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/how_to_conditionally_format_cells_in_tableau.pdfIn PDF document text
    • https://s3.amazonaws.com/nujosuwemedadi/the_little_couple_2019_schedule.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/splatoon_shoes_irl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4800797a-b96d-4bf5-b06d-4a5f0220515e/23578424868.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/bapogolefesineduw.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD5B 5104 bytes
SHA-256: b1703f9997d60b8ae41eb153bcbcda4cb1beea9b5aa243b1a6fac4398d6034dd
font_01_sfnt_off0000dead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAD 10236 bytes
SHA-256: ee05dfa619857ff6a01411b0628b539aac4b9458e62a177a45c090021641441d
font_02_sfnt_off000101c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C8 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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