Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1d7281b973a9768…

MALICIOUS

PDF

78.4 KB Created: 2021-02-27 22:24:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 864d147d4895ce79ff4db546e4e2710b SHA-1: 9fd4888ddb1292ce0e715b303911ba39d9c1daaf SHA-256: c1d7281b973a97689b32545390d68aa117279a6d7aa0159bb441bec9ce9acc27
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 offering printer ink cartridges, likely a lure for a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The presence of embedded URLs and the nature of the heuristics suggest it's designed to redirect users to malicious content.

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 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=black+ink+cartridge+hp+laserjet+p2055dn PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4428045/normal_60083f3e5db90.pdfIn PDF document text
    • http://zaxunux.iblogger.org/81657478649.pdfIn PDF document text
    • http://malitaludim.iblogger.org/the_power_broker.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369331/normal_60103fe789828.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370985/normal_5fe8bb3155404.pdfIn PDF document text
    • http://xurivikarode.iblogger.org/adb_android_tv_usb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490256/normal_5fde03ea5f143.pdfIn PDF document text
    • http://wedejopejujotu.iblogger.org/87045058940.pdfIn PDF document text
    • https://cdn.sqhk.co/ropobemuma/iahegij/kukedefazidijusutadir.pdfIn PDF document text
    • http://jalatuxu.iblogger.org/toppers_answer_sheet_upsc_anthropology.pdfIn PDF document text
    • https://cdn.sqhk.co/gutejalajige/hdQEhhA/16250275223.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409110/normal_6036a4da6a256.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/onan_7500_quiet_diesel_generator_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/wobimore/gLeRPha/turub.pdfIn PDF document text
    • http://kirakexig.mypressonline.com/dilezazizazowufo.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://zevofelajasuz.epizy.com/14067779200.pdfIn PDF document text
    • http://fosoxubap.epizy.com/tipos_de_sistema_operativos.pdfIn PDF document text
    • http://wutejaxevewef.myartsonline.com/cameron_hydraulic_data_19th_edition.pdfIn PDF document text
    • http://vokaraw.epizy.com/45396770959.pdfIn PDF document text
    • http://watijosanowo.epizy.com/dryer_sheets_for_hair_static.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE826 5600 bytes
SHA-256: be8eef77c11d37a2a044f294723b7b6f4c849d695a7169b83cc384049b961a46
font_01_sfnt_off0000fb2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2E 10244 bytes
SHA-256: 7e885d3b24bc970fe96a46a32caae66f68c4ffd791408e534ece5c3291c91a82
font_02_sfnt_off00011e4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E4B 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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