Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5ccefbd8b9b5ae4…

MALICIOUS

PDF

76.7 KB Created: 2021-03-17 10:01:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0dd8fdd3071d3d5adad2535d48b9af12 SHA-1: 5daee374fd6dcef07e631dfdac23b7b2e8dd8b0e SHA-256: f5ccefbd8b9b5ae4ab6203f8b1ccc6059de006dbb2eaec58f9301d31c5a1ddf7
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://jumiwimov.ru/strik?utm_term=how+to+write+hobbies+and+interests+in+resume PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368250/normal_60322b3ec4769.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405662/normal_60419bf83bcef.pdfIn PDF document text
    • http://gedirobidepud.scienceontheweb.net/94838754856.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481836/normal_600789b0cfc4b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369638/normal_5fc86f6a855c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424630/normal_5fe98214260f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412387/normal_600fd9dc20559.pdfIn PDF document text
    • https://tizamanana.weebly.com/uploads/1/3/4/8/134877207/3673984.pdfIn PDF document text
    • https://judozolu.weebly.com/uploads/1/3/1/4/131407514/fasugiziwujirik.pdfIn PDF document text
    • https://mapijilut.weebly.com/uploads/1/3/0/8/130873952/poruz_lexijaza_dowufepu_sadatuwiwa.pdfIn PDF document text
    • https://penogefuf.weebly.com/uploads/1/3/2/7/132740618/6545816.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498801/normal_60368f7d806fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473654/normal_604e2cca914b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471464/normal_5fff6e4fd7178.pdfIn PDF document text
    • http://lumobumekola.getenjoyment.net/50626126071.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://kepagewav.atwebpages.com/waterpik_cordless_advanced_water_flosser_wp-562.pdfIn PDF document text
    • http://luledajosa.epizy.com/wave_properties_and_math_worksheet_answers.pdfIn PDF document text
    • https://a4346b84-4611-49ab-b113-80c9188ca613.filesusr.com/ugd/078c79_4c98e19a06714f5280126da19240fd7c.pdf?index=trueIn PDF document text
    • http://tewilojejesuj.epizy.com/vowulalibuvekopuvaza.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B1 5108 bytes
SHA-256: 088ff939da566572a8220e0aae851b469042d3d59e3c00e16d8cfd89b8ac14a9
font_01_sfnt_off0000f3e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E3 10464 bytes
SHA-256: 93babb333950fc8affccacd6998117d605e43dd62c9ea56ddf768cb3dbdc7f9f
font_02_sfnt_off0001177c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1177C 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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