Malicious PDF — malware analysis report

Static analysis result for SHA-256 3830ff0f2b059a82…

MALICIOUS

PDF

62.2 KB Created: 2020-11-17 07:39:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: b01c2898abbaca2bd5c563aba0117be8 SHA-1: 7d81c024c77de6075758994c230a163a00d8cf33 SHA-256: 3830ff0f2b059a82f12c325196c1814ef92eef3bacfa302e7983d700fa3d6fca
222 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a campaign to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffmen.ru/123?utm_term=living+forward+pdf+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393506/normal_5f9a279e610bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465548/normal_5fa83cca67dff.pdfIn PDF document text
    • https://ladasewesadil.weebly.com/uploads/1/3/4/6/134665294/8432168.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372972/normal_5f9bc3550a54f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386092/normal_5fad4ea6304b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421048/normal_5f97e28f4c079.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406208/normal_5fafaa76808a8.pdfIn PDF document text
    • https://kejifesabateg.weebly.com/uploads/1/3/4/8/134847793/rujipuv.pdfIn PDF document text
    • https://ruwitopiramowu.weebly.com/uploads/1/3/4/3/134364975/5198089.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421048/normal_5fa35cb5c9640.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/new_yoai_anime_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/ms_word_create_new_page.pdfIn PDF document text
    • https://s3.amazonaws.com/xebareto/zuximozif.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/southwest_asia_study_guide.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_off0000b4d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4D7 5124 bytes
SHA-256: ad163964c201725f7cf86b47c1a0762bbd17fd6367673ce485fb181894752cd6
font_01_sfnt_off0000c679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC679 10688 bytes
SHA-256: 34fbcd5e2879c694f026318d30dd1060e75c14e3afe53c44d5b8801d1a9b4602

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