Malicious PDF — malware analysis report

Static analysis result for SHA-256 659e25038cb94c0a…

MALICIOUS

PDF

114.4 KB Created: 2021-04-29 03:55:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a52ed25a2eae327a58a97fc364ba8827 SHA-1: 7f16008192fd15904bb1b8d6020db583a86e5d53 SHA-256: 659e25038cb94c0af774240448e2e15a5dd65fc00c92ef289b354c3c65e0c2f0
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one prominent URL pointing to a site related to trading patterns, likely a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://seumenha.ru/strik?utm_term=high+probability+trading+patterns+by+kora+reddy PDF link annotation
    • http://itfamily.info/dafemomepikadapip2r0mm.pdfIn PDF document text
    • http://new-volosi.ru/redepikikekal10p7.pdfIn PDF document text
    • http://kyponnik.online/delizu8tl2h.pdfIn PDF document text
    • https://vutakajar.weebly.com/uploads/1/3/4/8/134896426/tetuguzevota_bejunotoxu.pdfIn PDF document text
    • http://lesasonaliru.iblogger.org/dewalt_dw715_blade_replacement.pdfIn PDF document text
    • http://begdas.fun/tidiwonefikofopltf85.pdfIn PDF document text
    • https://fofifakexetag.weebly.com/uploads/1/3/4/3/134345684/gekugemesufisuz_wolemaxavaxom.pdfIn PDF document text
    • https://luzulobopado.weebly.com/uploads/1/3/2/6/132681737/madelafovumezimito.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
    • http://nonixita.rf.gd/33278229414.pdfIn PDF document text
    • https://2fe0a9f4-4d23-48c4-8711-d5fb25093877.filesusr.com/ugd/683a75_7bc32706458847b29f0a4847079cefa7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sisaxu/10015952744.pdfIn PDF document text
    • https://1423d76f-a56f-4481-bf87-726e17039346.filesusr.com/ugd/14aee2_6396213f13bd43b0a1daed625fa09c59.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/40dbbd6d-c83e-435b-92a2-99d474f22405/how_to_use_the_dyson_dc50.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f6cd835-ab83-4b56-a41a-4d03b6335158/wefepelixumuxijalo.pdfIn PDF document text
    • http://viladitotaxuf.epizy.com/xizewenasere.pdfIn PDF document text
    • https://6f672a44-e16c-4921-a0f1-e3781c0647c5.filesusr.com/ugd/bda22a_7018682a7e9d4de4b8b239ae70071fc8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nigimul/gevilutapisexerog.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/26976844260.pdfIn PDF document text
    • http://viladitotaxuf.epizy.com/2020_tamil_daily_calendar_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/arellano_university_senior_high_uniform.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f91f1daa-0588-474f-82c7-518c83d9ac0d/17219433558.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015e0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E0A 5276 bytes
SHA-256: c423a712a2bf9eb3c6ccba0069742adce87072db39bd98815486f37e9e1931d2
font_01_sfnt_off00016fea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FEA 11824 bytes
SHA-256: f67c17ba9e6fef06f9b49bec7efcd641e2b52b4674acae17a6afcfb085709933
font_02_sfnt_off00019819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19819 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15
font_03_sfnt_off0001ad47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD47 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378