Malicious PDF — malware analysis report

Static analysis result for SHA-256 23960c7fbf68458a…

MALICIOUS

PDF

79.2 KB Created: 2021-04-10 04:05:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b61cf3d5c0cf99ccf96225b555b47137 SHA-1: d4ad5016fda5f0552c51bbefcb3109bf7e564ebe SHA-256: 23960c7fbf68458a992905bf8ac94c221236475b2f02c6384767470a204691fa
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://soxebez.ru/strik?utm_term=different+types+of+filmmaking PDF link annotation
    • http://jisuvakuwiraza.medianewsonline.com/concepto_de_trastorno_alimenticio.pdfIn PDF document text
    • http://tazizinujumijoj.mywebcommunity.org/bhagavad_gita_gujarati.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a22cca75-cc8f-459c-9eea-628147015b55.filesusr.com/ugd/2f8a36_f244626932d2420b8cff79960e25bcd8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gopuze/cellsalive_cell_cycle_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/48857163414.pdfIn PDF document text
    • http://bivojeda.atwebpages.com/cable_selection_formulas_for_electrical_load.pdfIn PDF document text
    • http://donijexufenu.onlinewebshop.net/si_joint_dysfunction_rehab.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/balance_sheet_excel_format_software.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/9171609730.pdfIn PDF document text
    • https://s3.amazonaws.com/musokejixami/kabofikekunofako.pdfIn PDF document text
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_86f54d128054446fa8cee67e18e1834f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wolawatin/13121587574.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/hp_officejet_pro_8610_ink_costco.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/candle_light_pic.pdfIn PDF document text
    • https://af6bd0e1-9fb2-4c52-b6e5-df6188d17e94.filesusr.com/ugd/771d18_d4b63bf7915c44f789d8f6c42e25ff22.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/77454077397.pdfIn PDF document text
    • http://lugenizuridaj.atwebpages.com/14011579019.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF787 5388 bytes
SHA-256: eac633e17519a5724065b2af763c57825e58793a31bbaf8d1eb1c328a79871ce
font_01_sfnt_off000109db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109DB 11708 bytes
SHA-256: 2c1943afc43369d0849426821929ba0591251ddc2f19085b1f387c196e2d9d08

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