Malicious PDF — malware analysis report

Static analysis result for SHA-256 c89402166e9f6218…

MALICIOUS

PDF

76.5 KB Created: 2021-03-02 17:39:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: bf01c3673fef2971e9b0afff758c1700 SHA-1: 13f8f5178a9a32c89c182c935edaadb51cc1208c SHA-256: c89402166e9f62188fe96b144c4967e47c181bc66c52a90dfe07d36e0f26a716
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. The PDF contains numerous embedded URLs pointing to disposable hosting and link farms, suggesting a phishing or malware distribution campaign. The presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly indicate the document's purpose is to redirect users to potentially harmful sites.

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://mezovuduw.ru/123?utm_term=how+does+globalization+affect+hr+departments PDF link annotation
    • https://radoxawema.weebly.com/uploads/1/3/0/7/130738714/16c55.pdfIn PDF document text
    • https://cdn.sqhk.co/xenivoronizu/ijajegj/gozemawituxumexiramiliv.pdfIn PDF document text
    • https://vifomamup.weebly.com/uploads/1/3/1/1/131163898/54d2e4913.pdfIn PDF document text
    • https://gavozosalaz.weebly.com/uploads/1/3/1/1/131163920/7511031.pdfIn PDF document text
    • https://vopisozojozesa.weebly.com/uploads/1/3/1/4/131407388/1d5623.pdfIn PDF document text
    • https://cdn.sqhk.co/xiwapusumoge/gdnjfhh/34361128253.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413982/normal_5ff85e89b1693.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472783/normal_600a005b0c92b.pdfIn PDF document text
    • https://xunasumip.weebly.com/uploads/1/3/2/6/132696393/vubedosuvixijegup.pdfIn PDF document text
    • https://cdn.sqhk.co/reriwoduriju/ihYjeXd/pazuxomowetozori.pdfIn PDF document text
    • https://cdn.sqhk.co/najiligopej/yKv2gi0/73470380280.pdfIn PDF document text
    • http://olx-delivery.cc/horary_chart_loveb2ud6.pdfIn PDF document text
    • http://exemplpusj.com/90226822325301dg.pdfIn PDF document text
    • https://cdn.sqhk.co/vomawoko/hbhgStZ/jazz_free_internet_offer_code_2020.pdfIn PDF document text
    • https://dekajemo.weebly.com/uploads/1/3/1/4/131453049/1542240.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE468 2940 bytes
SHA-256: b1a9ff6ba35dc6afe0897100fc92f3f1f3234f8fbf85b49142f1f5db2d57e62f
font_01_sfnt_off0000eef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF4 5812 bytes
SHA-256: 274928d2898be4f3c25f20060f4203b4d4ea186124c9b5b59c750ba08d631852
font_02_sfnt_off000102b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B0 9896 bytes
SHA-256: 59a87e252028aa603a4701df61d7f889d55a67b23c1a16752b4508b0613f3f9e

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