Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eed200f5862b276…

MALICIOUS

PDF

68.7 KB Created: 2020-11-12 14:47:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: eb9ff4d4a2f2361818cb9032ee60fe3d SHA-1: d46b031204938ff128c1a37546f384238ef5a290 SHA-256: 1eed200f5862b2761b00e68b8f68964d62df8a4ef8cf016784506b71260a9081
222 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic identifying it as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The presence of a 'download button' heuristic further supports a lure-based attack. While no scripts were extracted, the overall structure and link farm indicate an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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
  • 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://gettraff.ru/strik?utm_term=max+steel+2016+tamil+dubbed+movie+do In PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/liwefazawuzalal-dewatezata-wetezovefo-zimejiwu.pdfIn PDF document text
    • https://zimiduninu.weebly.com/uploads/1/3/1/6/131637103/jakadomabutot_limufawidivaw_zalowabi_dubukikowavoti.pdfIn PDF document text
    • https://gixodavo.weebly.com/uploads/1/3/4/6/134632057/sujupaxor-jutubizaw.pdfIn PDF document text
    • https://bevarolemi.weebly.com/uploads/1/3/4/6/134685224/20e90.pdfIn PDF document text
    • https://voganolov.weebly.com/uploads/1/3/4/3/134372868/getuwafitex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/09223db7-05de-4175-af59-0c8528267ab7/plano_7771-01_guide_series_tackle_system.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/pedavopip.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/28943491495.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/83892521887.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/music_notes_music_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/42323781048.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35f89ac6-8453-4c6f-ae99-57bc27b24adb/verilevumiboma.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/21359168295.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_off0000cbb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB0 5628 bytes
SHA-256: 2365965d20d4b2486401f07431816f279eee3949eb15923e5d9cf3818eaf3c11
font_01_sfnt_off0000ded5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED5 11560 bytes
SHA-256: cc670fc450dc72dbb805ecbcca619eb52ca804eb50a052cd0863077e7bd6e8e3

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