Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1a5b05e51b0e0f4…

MALICIOUS

PDF

74.5 KB Created: 2021-03-30 15:00:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: cb0d7d1927bda195676395d8d04749d5 SHA-1: efb096ee16ef72360e2577116d2a0dd3251963c9 SHA-256: f1a5b05e51b0e0f42684d67c6578b9cc98a677338de7f972ab50f5b9b7b45ab9
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, and the ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, suggests a lure related to business plans. The presence of embedded URLs and the overall heuristic firings point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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/award?keyword=business+plan+for+small+restaurant+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4475872/normal_602d38e01b8e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414680/normal_5fc85690f1fcf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377377/normal_602768ea58277.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478703/normal_600411b3f35c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505159/normal_5fc5ea7d06690.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9170d309-caca-4186-8987-bf6b40ce219c.filesusr.com/ugd/baef12_219de7ed2ef84f458d8a3f00ce065d0e.pdf?index=trueIn PDF document text
    • https://2eb5e741-fe40-4e13-9a70-20af0821b154.filesusr.com/ugd/6cf56c_9cc0f1efa13d4931b78ec3706279d57a.pdf?index=trueIn PDF document text
    • https://e148473a-3d1a-46f8-b788-fbc1f5af68d4.filesusr.com/ugd/e1e70b_8677f78795144b99896d29a3c6540501.pdf?index=trueIn PDF document text
    • http://damikofem.rf.gd/eclipse_neon_for_java_ee_developers.pdfIn PDF document text
    • http://bapaxezeb.epizy.com/scratch_shooting_game_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/dafumuxitupav/cakewalk_vst_adapter.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/how_to_create_aging_report_in_servicenow.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/how_old_is_a_dell_optiplex_780.pdfIn PDF document text
    • https://064d663d-f6b2-44cf-a6ad-083da5f315e5.filesusr.com/ugd/77eba6_c66bd22371704aeb987ccb26d2e901b3.pdf?index=trueIn PDF document text
    • http://mexesumofiruvaf.rf.gd/35297375013.pdfIn PDF document text
    • http://sopazanit.rf.gd/astronomy_books.pdfIn PDF document text
    • https://c72a6d71-2fad-4f5a-8b7a-a7c165485bce.filesusr.com/ugd/a4966f_1b518b0b735a4e278b61d8eca5e56a73.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/sixefimotuwo.pdfIn PDF document text
    • https://c1cb471f-fc5c-4ef2-b3e1-4d0d0d09d135.filesusr.com/ugd/cc5b41_a4ea542fa0e043aab8f3c10453009585.pdf?index=trueIn 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_off0000e7dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DD 5236 bytes
SHA-256: 6736542f69244ec266d376433ebbfd30799b40d15bbba55182543af02c13969c
font_01_sfnt_off0000f998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF998 10296 bytes
SHA-256: ce6ab4f7f719a2b6aac502900a4d77dbd39dab5c8d80ed10ffbad765d977987e

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