Malicious PDF — malware analysis report

Static analysis result for SHA-256 1602116782596215…

MALICIOUS

PDF

76.5 KB Created: 2021-03-17 00:43:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1d1ebb00247943482a0ae073ea1d108c SHA-1: 2186ec1b6145beb963d9f52cc07c60908a7a5b67 SHA-256: 16021167825962156cca77451e971fe2217b7088a3ce0314620870bf4a1bae09
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting it's part of a link farm designed to redirect users to potentially harmful content. The primary URL identified is https://druttle.ru/award?keyword=borg+rpe+scale+6+20+pdf, which likely serves as a lure.

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
  • 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.
  • 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://druttle.ru/award?keyword=borg+rpe+scale+6+20+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479454/normal_5fdc53948cf4f.pdfIn PDF document text
    • http://gozadelaluf.22web.org/fusion_software_for_pc.pdfIn PDF document text
    • https://dolojimopa.weebly.com/uploads/1/3/4/8/134887070/7324155.pdfIn PDF document text
    • https://zesaxigupube.weebly.com/uploads/1/3/4/0/134016892/573337abf4baa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460946/normal_604ebcc27be00.pdfIn PDF document text
    • https://kowijifeno.weebly.com/uploads/1/3/5/3/135390944/dotujubujevofe.pdfIn PDF document text
    • https://kesavowefobulet.weebly.com/uploads/1/3/5/9/135976175/dakozid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450731/normal_5fee720f7ca27.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://45ae50e1-98a8-4501-9ad6-fc0df438eb43.filesusr.com/ugd/b16523_b8693119a60c48e789d692e51a18016a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/patilawasu/28898570228.pdfIn PDF document text
    • https://a97be2a3-bfb5-42de-bba9-b145341b31aa.filesusr.com/ugd/1f2860_3b0ddb3eda7f4842a1fafa34721003fd.pdf?index=trueIn PDF document text
    • https://da25564d-e3c2-4b9b-87ba-dd8ce2ae78d4.filesusr.com/ugd/c82cd6_4c07a83ba7d24882bd26667db9c38088.pdf?index=trueIn PDF document text
    • https://d5e9a058-cbdc-4968-ba72-30cdbf1e36a3.filesusr.com/ugd/9cfd0a_20ed399a583949a5bebc630774e92e8d.pdf?index=trueIn PDF document text
    • http://bozalusi.epizy.com/what_size_round_does_an_ar-15_use.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/draw_with_jazza_creating_characters_free_download.pdfIn PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_04412d6b115d4ed683860426d850e5f2.pdf?index=trueIn PDF document text
    • https://451b78f8-089e-4d4d-bc4b-60abb621f7e6.filesusr.com/ugd/7ef0dc_a93c793c76f5473a8c6bc62facf8f676.pdf?index=trueIn PDF document text
    • https://1a6defe7-92a0-4357-8a70-d3bce85d30c9.filesusr.com/ugd/385065_9a28649ecce84c308a23e4dbaced25d1.pdf?index=trueIn PDF document text
    • https://f1c0478e-57b3-422a-b8eb-433964b677d2.filesusr.com/ugd/16c17d_d3196ad0aa314bd8826f15d51db840b2.pdf?index=trueIn PDF document text
    • https://0621cc9e-6449-4e8a-a8bd-baee9ad62a2c.filesusr.com/ugd/affb4a_8c0186b5fca64386a3f6815d64b8c89e.pdf?index=trueIn PDF document text
    • http://gixoluzex.epizy.com/bazaxipufigo.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_off0000ea78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA78 5800 bytes
SHA-256: b1f5117fab6e88a821e274813efa05d17020fb8387e34c16f17186b171f2af7b
font_01_sfnt_off0000fe50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE50 11340 bytes
SHA-256: 04c0ec95e91aae80e87198a0913f3e3284696d64d1d5f71c556eaa9c2196f669