Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6fa2e044f77bb82…

MALICIOUS

PDF

72.4 KB Created: 2020-12-16 21:27:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 34456f116a2648494bc20ecebc2dee6b SHA-1: 828c27b4c97a83e1dd924174ce7d5bbf9483eb8f SHA-256: b6fa2e044f77bb82c2814f240569f7c5d2a7b8f77ffd4d522fced237e1befd0b
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The ML classifier also flagged the PDF as malicious with high confidence. The presence of numerous external PDF links suggests a link farm or redirection attempt to obscure the ultimate destination. No scripts were extracted, but the embedded links are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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://traffmen.ru/123?utm_term=there+were+13+original+states In PDF document text
    • https://gojenegitoz.weebly.com/uploads/1/3/4/3/134387591/jikefo.pdfIn PDF document text
    • https://nujamoxe.weebly.com/uploads/1/3/4/2/134234607/zawomemafaloji.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/wozoxub/jatuxowuj.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2ca3a3dfdd95b60e15de0/t/5fc8a9fe46ef2e08cbbb5fbf/1606986238495/repost_app_not_working_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66d8e103-f76e-430f-9ef2-6b2299383827/keto_shark_tank_diet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe03e1e18c5c478ec26d37/1606288360182/lee_county_schools_vaping.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3425752-0d03-46fe-a716-70a444ba5b0f/dovuzesapo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a98b7f2-9094-4041-ae68-95c50595a437/albion_online_farming_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce83a6142f2433c72768f9/t/5fd65710267c8d0ace45400b/1607882512479/animated_cartoon_clipart_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc364f7104edf1d7790e178/t/5fc517f69b1ed035387efd22/1606752248393/54884420045.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/new_movie_songs_tamil_2019.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5acadaffbf90a660b1fb2/t/5fd62858acac596b0cb2b54e/1607870552413/plastic_sheet_manufacturers_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16d59cb6-db55-4aa4-9443-943341a7d88d/85036217403.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_off0000dfaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAA 5204 bytes
SHA-256: 5f8c8a8bb1f88449b41ea50d5cdc81eead856f7909c95a66af06df629bbdfd9c
font_01_sfnt_off0000f174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF174 10272 bytes
SHA-256: 72d808c0cb4fdb49164bff0b294c4e0c088478667b1607721bcc160e500d5fd3

Open this report in the interactive analyzer, or submit your own file for analysis.