Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce979eb0d72a454e…

MALICIOUS

PDF

79.5 KB Created: 2021-05-24 11:02:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98732f9ed6d2b99a509661fa2c6e288e SHA-1: 2836746d0c934dbb066391bf7e7518bab6be9823 SHA-256: ce979eb0d72a454e6630f3e1f9eaf341e2855823701c8d4cd383e821352a8f04
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, including one to 'lozipotod.ru', which is flagged as suspicious. The 'PDF_SEO_LINK_FARM' heuristic indicates a large number of generated links, suggesting a malicious intent to manipulate search results or distribute further content. The 'ML_NYX_PDF_MALICIOUS' and 'ClamAV: Pdf.Phishing.Trojan' detections strongly indicate malicious activity, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://lozipotod.ru/strik?utm_term=how+to+root+android+phone+using+terminal+emulator
    • https://cdn-cms.f-static.net/uploads/4388178/normal_6035e89f4274c.pdf
    • https://gojemafofapuvog.weebly.com/uploads/1/3/2/6/132681271/a80cf.pdf
    • https://cdn-cms.f-static.net/uploads/4413838/normal_6015391fae923.pdf
    • https://cdn-cms.f-static.net/uploads/4375517/normal_605fd6ea37f3e.pdf
    • https://vumukawa.weebly.com/uploads/1/3/4/6/134662430/xalugavizofabep.pdf
    • https://jerumegilaguro.weebly.com/uploads/1/3/0/7/130776399/666842c.pdf
    • https://cdn-cms.f-static.net/uploads/4472764/normal_602d4cbd2c7cc.pdf
    • https://static.s123-cdn-static.com/uploads/4446399/normal_5ff165220ee48.pdf
    • https://cdn-cms.f-static.net/uploads/4465386/normal_6046cfef80422.pdf
    • https://static.s123-cdn-static.com/uploads/4367279/normal_5ffcb107d98ae.pdf
    • https://static.s123-cdn-static.com/uploads/4369920/normal_5fce5c208ad66.pdf
    • https://cdn-cms.f-static.net/uploads/4448740/normal_6044675fdf171.pdf
    • https://mudizuponiwox.weebly.com/uploads/1/3/2/7/132740987/7986980.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fosagoba/panabajerijawumunu.pdf
    • https://s3.amazonaws.com/mudurixo/54608981901.pdf
    • https://uploads.strikinglycdn.com/files/32306fa3-3214-4d1f-bc7d-ba2e5e0445ee/juwekaboba.pdf
    • https://uploads.strikinglycdn.com/files/4cb34584-a581-4ddf-8860-dd94c7fcb83a/lewunekisokomidunevadu.pdf
    • https://uploads.strikinglycdn.com/files/72e17e1c-efcf-4f4d-93d3-70a7fda4595f/81890354001.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f922.bin
c25226d0844b5efce303da83e036c50a46965c2523fcf1303ec9ea6ba397fba9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF922 5428 bytes
font_01_sfnt_off00010b7b.bin
1c6d0fd075d5b2e8065966980b418aec1432d1636b4dcbe2bebbd11129763084		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7B 10848 bytes

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