Malicious PDF — malware analysis report

Static analysis result for SHA-256 61aa0120b497e10e…

MALICIOUS

PDF

78.2 KB Created: 2021-01-14 04:13:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 8975b466aeda1b9c6e6b66f6442574a0 SHA-1: bd8a9e3de23cd064956eddd2cf445a3f00db7cac SHA-256: 61aa0120b497e10e40107b8ec85b22e45490a05589f6b5ac92441b00b9c6da1c
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'https://traffking.ru/123?utm_term=ortho+bug+b+gon+review', which is likely used for phishing or to download a secondary payload. The document body, though heavily obfuscated, contains references to 'ortho bug b gon review' and the authoring application, suggesting a 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://traffking.ru/123?utm_term=ortho+bug+b+gon+review PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417037/normal_5fa9cbe64b588.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415745/normal_5fa646e2a7bca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374983/normal_5f9014a02b84e.pdfIn PDF document text
    • https://site-1176376.mozfiles.com/files/1176376/youtube_jennifer_rush_greatest_hits.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365619/normal_5fb6b68773027.pdfIn PDF document text
    • https://site-1172650.mozfiles.com/files/1172650/klondike_solitaire_free_download_ipad.pdfIn PDF document text
    • https://site-1166680.mozfiles.com/files/1166680/download_game_piano_tiles_bts_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481839/normal_5fe4f0db59e23.pdfIn PDF document text
    • https://site-1177862.mozfiles.com/files/1177862/does_jupiter_save_earth_from_asteroids.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/51180093478.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/46343635476.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/nevada_modified_business_tax_return_form_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/38662133688.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/54875661705.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/jitage.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_off0000f4e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E3 4848 bytes
SHA-256: e913e84fcc1f0d27463f30be31af287b2efe7d93c3cce785f963cea09a62f086
font_01_sfnt_off00010577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10577 11276 bytes
SHA-256: 44e829f50352ff6c422db53590fa26af9956e3c8369ac1ed4b004fd7998ad277

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