Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ff70c018706d89d…

MALICIOUS

PDF

74.3 KB Created: 2021-03-11 02:48:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: a6fdd1ea6493d8d21e5de9943dce5679 SHA-1: c94087e99286198d4ebb63e9236f4a7731730b9e SHA-256: 0ff70c018706d89d946fd4a66d5de24d2c23f3741eb0a46e2c275c1e6f69eefb
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are SEO-farmed to appear as legitimate documents, but lead to unknown domains. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing. The embedded URLs suggest an attempt to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://mezovuduw.ru/wix?keyword=evaluation+essentials+from+a+to+z+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4479212/normal_5ff88cf220b7e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473619/normal_5ffea117ca90d.pdfIn PDF document text
    • http://afracheat7.xyz/top_down_and_bottom_up_approach_to_readingtasxz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499317/normal_6004db2d8f431.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484605/normal_5ffff2017f3a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404293/normal_5ffd314512551.pdfIn PDF document text
    • http://budokudepa.scienceontheweb.net/23325730795.pdfIn PDF document text
    • https://dedotomonifagax.weebly.com/uploads/1/3/1/6/131606429/2116024.pdfIn PDF document text
    • http://difozoxezepi.getenjoyment.net/advertencia_miranda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403807/normal_5feeb929b3595.pdfIn PDF document text
    • http://znalomstvavip.site/3d_pool_ball_mod_apk_offline6myr6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410416/normal_601efda4b77a7.pdfIn PDF document text
    • http://sfhgfje5df.xyz/dakibeb8fg58.pdfIn PDF document text
    • https://webavetoromezo.weebly.com/uploads/1/3/5/3/135346546/9592315.pdfIn PDF document text
    • http://xomunuxeju.sportsontheweb.net/3_point_perspective_drawing_step_by_step.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sodowurivav.onlinewebshop.net/79497706509.pdfIn PDF document text
    • http://donijexufenu.onlinewebshop.net/6213879773.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/2106615773.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/52801416278.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/tevesifumekogel.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_off0000e582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE582 5256 bytes
SHA-256: 333ed27fbed6b6b9479c6382477ab4a2a772b5989df6163b51ae13976481d399
font_01_sfnt_off0000f761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF761 10752 bytes
SHA-256: ad7163374a67906438ffa98e31d1b63f834afc64563a0da12ed737e258264335

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