Malicious PDF — malware analysis report

Static analysis result for SHA-256 49c055357d1db9e2…

MALICIOUS

PDF

47.0 KB Created: 2020-11-02 08:57:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 5670e6db5595355d1b2ae607a9cf8040 SHA-1: e7aa6fd1b49a550552001d41163329656216b977 SHA-256: 49c055357d1db9e2de65de60c6ed2d0ed9df4008c25012622a0466379da26177
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, which is designed to lure users to malicious websites. The document body, though heavily obfuscated, contains text that appears to be a lure for 'Guild Wars 2 strategy guide', likely intended to entice users to click the malicious link. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/strik?keyword=guild+wars+2+strategy+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4402938/normal_5f931093c3f2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408595/normal_5f9f5ebd13945.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/558131f3-e7c5-4fdc-94aa-1d97840e661a/destination_b1_photocopiable_tests_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82503672-9f70-426d-b0e4-6ace75449db9/wukimawit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3327c831-c592-4246-ac36-3aac9810be0c/ketelomulivutiwebofivi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0473/8672/2473/files/vawiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac6ef159-64a9-4a91-b3bc-edb296291d1c/tonarijezozaxakifa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d752fed-7dfe-4f39-aed8-7afbf438d8fa/2512987837.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3281/3473/files/95703791269.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/5021/9692/files/pakoxajubejidijexovokuxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9902/1220/files/310.16_ampacity_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/statistical_quality_control_7th_edition_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/wuloweteduwobijikedesizo.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_off0000782b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x782B 5348 bytes
SHA-256: 8f0930e4d2ba45477fc0a1675b67f980d599603d388946404e797d9e5e581aa3
font_01_sfnt_off00008a84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A84 10972 bytes
SHA-256: 178a269068ea65b08654c2f79404caa8972a695efd91ee1176e42f924c5e3698

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