Malicious PDF — malware analysis report

Static analysis result for SHA-256 d80b5bede72019cb…

MALICIOUS

PDF

74.2 KB Created: 2021-02-10 05:42:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 34885a3de84dad75257d4fd408956881 SHA-1: 5f3456b3441d3c0c1982c16545c958a719e6e6bd SHA-256: d80b5bede72019cbabba2ae4b1b6790ea6457e8c47a1fa488cbeb1174a52fe49
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external links, suggesting a phishing or SEO manipulation scheme. While no scripts were explicitly extracted, the PDF structure and external link farm point towards an attempt to redirect users to malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/123?utm_term=downtown+magnets+high+school+los+angeles+ca PDF link annotation
    • https://zevijilutijeso.weebly.com/uploads/1/3/4/8/134850931/6994522.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422879/normal_5fff26f8243ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456984/normal_601297474b73e.pdfIn PDF document text
    • https://cdn.sqhk.co/jasekazus/idhcPZh/13405628871.pdfIn PDF document text
    • https://cdn.sqhk.co/vavegewumur/qL3iiBo/korogiteba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368479/normal_6001e01547a59.pdfIn PDF document text
    • https://cdn.sqhk.co/satofurijob/jgha1ig/31666451352.pdfIn PDF document text
    • https://cdn.sqhk.co/votijavos/xibiDjh/tinukiwog.pdfIn PDF document text
    • https://cdn.sqhk.co/birenejar/e39gdig/nejokokotapaduji.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462775/normal_5fee4c4fce039.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404730/normal_5fca37dd2ee78.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460946/normal_5fde70a55f75a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373281/normal_5fdc4d0fce210.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460954/normal_5fd152871bdf4.pdfIn PDF document text
    • https://cdn.sqhk.co/gujadozede/jghhcJR/xasilazir.pdfIn PDF document text
    • https://tajuwelaf.weebly.com/uploads/1/3/1/0/131071184/2fa7844465b8.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/9Thdric/baseball_9_innings_2011.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475212/normal_60230bf36299d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409811/normal_60078a8311079.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408346/normal_5fcd2e18423f0.pdfIn PDF document text
    • https://cdn.sqhk.co/miloxuso/7mIjbjf/yahoo_weather_forecast_karachi.pdfIn PDF document text
    • https://cdn.sqhk.co/fematixub/hfIhjiI/suwaravataxamafajileziw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e62c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62C 5208 bytes
SHA-256: 933efcebb782645d359bbbc84535184faa2c5696036e96264e6b1210091780fe
font_01_sfnt_off0000f7da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DA 10496 bytes
SHA-256: b0926f57f3f0475ddd5613e1a72842a2920719fca337ad79bed488404adf85ab

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