Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbffd2f02933d7aa…

MALICIOUS

PDF

82.6 KB Created: 2021-01-17 11:49:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b8d1019d225880775e2ecc4edd38180c SHA-1: 42fb418407f3de39358a8f5c8f783164763c792f SHA-256: fbffd2f02933d7aa2649574fc4a1227424e6785df43d05da8abedaeb1b9d6810
214 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many pointing to known malicious redirectors and link farms, suggesting a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure for a game mod download, which is a common tactic for distributing malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://cctraff.ru/wb?keyword=l%20the%20one%20action%20fighting%20game%20mod%20apk In PDF document text
    • https://cdn.sqhk.co/jozojijejip/RQ7TcKe/42330488961.pdfIn PDF document text
    • https://xufiwelak.weebly.com/uploads/1/3/1/1/131164558/xipil.pdfIn PDF document text
    • https://xiwofisenitew.weebly.com/uploads/1/3/4/8/134879753/1407070.pdfIn PDF document text
    • https://cdn.sqhk.co/gojikanemiju/ifgcoT9/tifatumigale.pdfIn PDF document text
    • https://zemejinifuv.weebly.com/uploads/1/3/4/5/134577925/9860934c3.pdfIn PDF document text
    • https://sakukavazu.weebly.com/uploads/1/3/1/3/131379729/rafanotovi-duvibu.pdfIn PDF document text
    • https://temonobulap.weebly.com/uploads/1/3/4/5/134592988/7013750.pdfIn PDF document text
    • https://cdn.sqhk.co/jemowevu/ege2jdU/87046903979.pdfIn PDF document text
    • https://cdn.sqhk.co/fofotixoz/icidfXC/tv_cabinet_designs_for_living_room_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/soleximu/RjhTswN/iphone_5s_32gb_rtv_euro_agd.pdfIn PDF document text
    • https://cdn.sqhk.co/refevebux/jiXghhd/koravadusilukod.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/antigenic_determinants.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/architectural_acoustics_principles_and_practice.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/jorge_borges_ficciones.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/bhakta_kanakadasa_kannada_movie_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/bethel_school_district_v._fraser.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF258 1876 bytes
SHA-256: 55e4f348492c8d91575c64ee59a216331e48d46c866dc7486d6a36d7e0ba6293
font_01_sfnt_off0000fb68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB68 5268 bytes
SHA-256: 6afd07d61133d2a788b70a28a4461504b4f8a96185c397cb64d8e4af8eb5ccf1
font_02_sfnt_off00010d33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D33 1736 bytes
SHA-256: c446d72d3d42e61a860e23f90c0583061b4219ca47a43db5d1c780bb5ac7a4d3
font_03_sfnt_off000115d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D3 11740 bytes
SHA-256: 6b83f9304735abaf3f6eba361835982660d0c1226fe9a9bddab2d39b49740249

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