Malicious PDF — malware analysis report

Static analysis result for SHA-256 72548239ba92f291…

MALICIOUS

PDF

77.2 KB Created: 2021-03-23 18:02:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 21a3e66588708b683c5f8dff5be4b0d5 SHA-1: deaeb837383c4e91da96009fd89782105f6ac647 SHA-256: 72548239ba92f291d6656f6b10703a289f40825d83df38eabf29d76f9b6fde11
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://dugedepap.ru/strik?utm_term=how+to+replace+cord+on+beats+headphones PDF link annotation
    • https://rodinesupogoj.weebly.com/uploads/1/3/1/3/131384539/jetumuwuzudux_nanudijivudipa_jiluzitinomimo.pdfIn PDF document text
    • https://titezexi.weebly.com/uploads/1/3/4/6/134639754/6122f.pdfIn PDF document text
    • https://melijezaziwoni.weebly.com/uploads/1/3/4/8/134851492/3810212.pdfIn PDF document text
    • http://xasedogamif.mypressonline.com/mathematics_olympiad_questions.pdfIn PDF document text
    • https://zakazorexan.weebly.com/uploads/1/3/1/4/131407051/b3278b8.pdfIn PDF document text
    • https://pafokosunokiv.weebly.com/uploads/1/3/4/8/134860442/6965247.pdfIn PDF document text
    • https://kewenarizifosiz.weebly.com/uploads/1/3/6/0/136092989/kugumavilelowe_togusuduwo.pdfIn PDF document text
    • https://nivujetomut.weebly.com/uploads/1/3/4/7/134753784/dca46c.pdfIn PDF document text
    • https://wotigutaz.weebly.com/uploads/1/3/4/3/134361511/rivove.pdfIn PDF document text
    • http://jewogipuwivi.medianewsonline.com/effect_of_substrate_concentration_on_enzyme_activity_lab_report.pdfIn PDF document text
    • https://ziwegakesamud.weebly.com/uploads/1/3/4/4/134468237/3999719.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3c86e5df-9a55-47dd-9d5b-c207b25ec6cd.filesusr.com/ugd/72bf36_2cb3f089ac0648c0a5f2aacaf206ff63.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tarajix/computational_fluid_dynamics_books.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/96164403920.pdfIn PDF document text
    • https://ec451167-49e0-489e-a150-d7dc0ecf9264.filesusr.com/ugd/fe0276_50b8d40a7bd84dfab88e18723711d26f.pdf?index=trueIn PDF document text
    • https://24d1f61b-f5c5-4d2f-8180-62589f44e8d8.filesusr.com/ugd/eed56f_8b83c9bc05da47639a7189df9176b5f1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nitatotol/publisher_christmas_gift_certificate_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/vokaxojenusufa.pdfIn PDF document text
    • https://eff7b67d-fef5-45b7-bcd6-ffb1b71d3a14.filesusr.com/ugd/b4c9df_5cf0c55dffaf4d3b9b03715e08e43878.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/best_web_design_company_in_delhi_ncr.pdfIn PDF document text
    • https://d4f4546a-a836-4b3d-8651-c56b89608eca.filesusr.com/ugd/3e9e83_f2441b4ca87448569747180586f03030.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/woberiz/60718719285.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AC 5356 bytes
SHA-256: 763b33e84bec4d0c8d61caea7d55dbfd8d2b548b84620f3b22e4953c00dcb4a7
font_01_sfnt_off000102dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102DC 10612 bytes
SHA-256: eac3b577a11a90ac8cbc504db4534556428beaca98d6c8d57bbbb19b71311935

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