Malicious PDF — malware analysis report

Static analysis result for SHA-256 d09aaabb5465ef3d…

MALICIOUS

PDF

77.4 KB Created: 2021-03-05 20:58:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 7623a6571cc059f1dbbe62dcdebd156e SHA-1: 12932179b0cd3ba798906a8070e162f1f38fbde3 SHA-256: d09aaabb5465ef3d4e551067f4a5072540cfeaad4a4f9cad96d7ea786c2c76e2
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, and multiple heuristics indicate it functions as a link farm, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://xajibur.ru/wix?keyword=king+of+the+murgos+pdf PDF link annotation
    • http://pimolala.22web.org/admission_form_template_bootstrap.pdfIn PDF document text
    • http://0fruits.space/yeast_fermentation_lab_report_introductionyirtx.pdfIn PDF document text
    • http://jojazinex.mygamesonline.org/mofejoxujuvafojato.pdfIn PDF document text
    • http://zegofivuwirukon.22web.org/julumimobipuv.pdfIn PDF document text
    • http://daliadiago.com/disgaea_5_sage_guidefy4yc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412593/normal_6013c1a0d3e7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487381/normal_5fd344d3f1b01.pdfIn PDF document text
    • http://selectgetc.top/vba_excel_tutorial_2016nsx77.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ralipuzejemozuz.epizy.com/nasipoxenalo.pdfIn PDF document text
    • http://radizala.epizy.com/sleep_eric_whitacre_score.pdfIn PDF document text
    • http://gizolon.epizy.com/pemogikuresoredewufeket.pdfIn PDF document text
    • http://nenutufap.epizy.com/66654514971.pdfIn PDF document text
    • http://mafakizukizunof.epizy.com/semopam.pdfIn PDF document text
    • http://todugiremo.epizy.com/bolufajosonob.pdfIn PDF document text
    • http://nejesezape.myartsonline.com/vugolapowizogewerajobipor.pdfIn PDF document text
    • http://dozonox.epizy.com/nse_algorithmic_trading_module.pdfIn PDF document text
    • http://xuxusemo.epizy.com/92784688758.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF497 5184 bytes
SHA-256: d1f0a967f49b054c72d63abb0dc2fd8b04e56581ddc27364a93a72bfad02e94a
font_01_sfnt_off00010621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10621 10108 bytes
SHA-256: 15b2f893a5b573da928e3478516f388ba4fd6aaa5a2b91a993bd1d06fe54f048

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