Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a21588e8d5298d3…

MALICIOUS

PDF

76.4 KB Created: 2021-03-21 20:53:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0558ecd2fc166d7ddd60981d3b5746ce SHA-1: 26a9529cdce8543db4e472307b58a9b228b86dd8 SHA-256: 0a21588e8d5298d3e327fdf6bde9490bfde2956d71502d2c44b58604a84dbee2
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains embedded URLs that likely lead to further malicious content or phishing sites. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of multiple external links suggests an attempt to redirect the user. No scripts were extracted from this sample.

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://cdn-cms.f-static.net/uploads/4458848/normal_600d30fab4991.pdf In PDF document text
    • https://cdn.sqhk.co/nolugavetiri/fgc7ghr/guide_des_tailles_blouson_schott.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459631/normal_5feecba4b8f10.pdfIn PDF document text
    • https://cdn.sqhk.co/muzorefu/gggjaCO/demon_hunter_dungeon_talents.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451760/normal_6025368401c8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477863/normal_603ac4ac0899b.pdfIn PDF document text
    • http://topmassage.net/55400168422qeftq.pdfIn PDF document text
    • http://tohld.in/world_war_one_worksheets85anr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402963/normal_601dc8265b6ee.pdfIn PDF document text
    • http://petrol-v-pol-price.site/pemufezupiwol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446924/normal_600842eb5287d.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
    • http://feedproxy.google.com/~r/wb/ENAH/~3/vAIYpVcV8Aw/wb?keyword=midnight%20sun%20twilight%20zone%20castPDF link annotation
    • https://uploads.strikinglycdn.com/files/3cac9fcc-e30f-489f-a5b8-c29e4e86f8c8/60831352104.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edf8c7a3-627e-415f-96ad-070d998193ba/andrew_loomis_drawing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9666e0a6-a0bc-465e-a095-66687dd5c8cc/41916097790.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/263ea3d9-3256-476f-a7ec-4fbcb4495d9e/what_are_the_end_results_of_cellular_respiration.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15ead763-d1cc-4948-99b5-31c80d7dbbc5/xomidadawulupofom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be1e9e3e-98c6-4e77-b07a-77ca0e837327/26409639441.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_off0000df4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4E 5136 bytes
SHA-256: 4289bf1aff7539aef6eb0a4a651f5a62642606090708421c00d4d9791d752d12
font_01_sfnt_off0000f0d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D9 11092 bytes
SHA-256: 4ccb4ecac0651d260bfafe0b8adc4c096f9f3143add72fd194377534cd3fc4ba
font_02_sfnt_off00011670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11670 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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