Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e0ee762a9ec8b9f…

MALICIOUS

PDF

88.3 KB Created: 2021-02-15 13:09:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 1d684a3efe44c5ff3ce429994b955217 SHA-1: 8237ba9f1c6632919663eb2b055d1bde6b551bea SHA-256: 4e0ee762a9ec8b9f1b3087eac26871afcb8640273f0f7550fa1b68ca18568ef8
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged by a machine learning classifier and contains multiple links to known malicious redirectors and disposable domains. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that at least one link points to known malicious infrastructure. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic further suggests a pattern of using numerous links on disposable hosting, likely to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crophysi.ru/123?utm_term=la+fuerza+de+sheccid+wiki In PDF document text
    • https://nupigefaxobabu.weebly.com/uploads/1/3/1/0/131070289/zugebasi.pdfIn PDF document text
    • https://daxodewime.weebly.com/uploads/1/3/1/3/131398188/pirasaleban.pdfIn PDF document text
    • http://xexogafuko.22web.org/kawazawexivekafalalagimo.pdfIn PDF document text
    • http://logunej.iblogger.org/feelings_worksheets_1st_grade.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381344/normal_5fc601409ab0f.pdfIn PDF document text
    • https://pekizexigobuton.weebly.com/uploads/1/3/0/8/130815014/9105510.pdfIn PDF document text
    • https://migobagola.weebly.com/uploads/1/3/4/8/134874333/8865424.pdfIn PDF document text
    • http://pawarelubasiwu.iblogger.org/java_programming_tutorial_videos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dakebesuvum/43371101185.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/babam_bam_bam_lehri_song.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/aamir_khan_video_song.pdfIn PDF document text
    • http://sokagozu.rf.gd/fogodedegowufufukilavu.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/fapaxodod.pdfIn PDF document text
    • http://tavopaku.rf.gd/customer_details_template_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/python_3_string_format.pdfIn PDF document text
    • http://zorogeloma.epizy.com/ac_web_ultimate_repack.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4B 4812 bytes
SHA-256: 65d261df25bf022e3a112e5e66652ace099eb7d3bc9a1f05bb85821082630cc0
font_01_sfnt_off0000fdcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCC 2520 bytes
SHA-256: bb679dd2f5e7520dd80ca4e7516b70dd20d08442ffb6cf4e1f3209b024a90817
font_02_sfnt_off000107b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B5 11820 bytes
SHA-256: faa6d534fd8f46894a5099de70de8eb88097ac5702d11e264456d35471684aec
font_03_sfnt_off00012e84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E84 16204 bytes
SHA-256: 514ec34c774379c82780ce3b826aceada3291152a2a4734d997485cf707bbc49
font_04_sfnt_off000143d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143D2 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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