Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b7abab8bb6ae228…

MALICIOUS

PDF

65.0 KB Created: 2020-12-18 04:45:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 49255ecbc132a21778761d5c3a526962 SHA-1: bb88a703939830ae762f09a4a4e9caf57d79a76b SHA-256: 1b7abab8bb6ae228bfead3cdb6d0b5bbda28b76d1779f23ce45746b257a3814c
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The embedded URL, https://trafffi.ru/strik?utm_term=zombs+io+hack, is the primary indicator of a phishing or malicious content delivery attempt. No scripts were extracted, but the PDF structure and embedded URI suggest a phishing lure.

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=zombs+io+hack PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/83218801430.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4ce616609fd0ee7aa78df/t/5fc8fbe918eb434f9ec8e474/1607007210454/javesejiridixunoje.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc71f31f9cd615d7ca61d9b/t/5fce7e1f86458902ebb96775/1607368225053/free_funny_videos_for_whatsapp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec35bd04-1763-470d-a9d2-ce9fca123b5d/zoveno.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/1860103535.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc529d86609fd0ee7ad3c2c/t/5fc679e8eaf37e3b647bfce7/1606842857735/39232865826.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce10520356d927d7eba8c1/t/5fd64af4ab777271768b8f37/1607879413257/74363103495.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f23043b-6062-425b-8ac5-bee2f4c28819/41485884088.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/formation_administrateur_indpendant_sciences_po.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/messenger_android_error_505.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc283f51c8c7413143c2872/t/5fc47b3de18c5c478e8b1b1e/1606712125912/is_batman_dead_in_harley_quinn.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23a6458a-237b-4b3e-bf31-426f3e9d074f/fufel.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2a6a6104edf1d778c2ced/t/5fc4b098a97599144e8d3343/1606725784875/nouns_to_describe_a_person_negative.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_off0000c2ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2EC 5072 bytes
SHA-256: 21ff0dded6b397fb0a8eb8cb2f049fb70f3fb8884bc8a5667bd67394ae109766
font_01_sfnt_off0000d407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD407 10404 bytes
SHA-256: 01a717aae5e305d3dffe019f5fd250d156b93ab6970b44d52a11c362185b3eef

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