Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f6dc2b7160f5913…

MALICIOUS

PDF

61.4 KB Created: 2020-11-25 21:45:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: cf4f256030ac994bad00b2fcf3746ac0 SHA-1: 667799f2ea7a9a3935d61d984faea38adf27ea77 SHA-256: 2f6dc2b7160f5913853b09517b6ad7ac1309e2dc63ee8e8bfd58f6bb97218e5c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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://traffine.ru/strik?utm_term=hay+una+uncion+letra+con+acordes PDF link annotation
    • https://fosuzotarodaduv.weebly.com/uploads/1/3/4/3/134391180/kegevijegebud-rivazakulow-musajofar-gekevedilejokes.pdfIn PDF document text
    • https://titawijuneve.weebly.com/uploads/1/3/4/0/134012454/kedosuw-sewipupagotaje-bojop.pdfIn PDF document text
    • https://fekudumubaf.weebly.com/uploads/1/3/2/6/132681201/3321595.pdfIn PDF document text
    • https://rudofodirofebas.weebly.com/uploads/1/3/0/7/130739781/xudeponujupi.pdfIn PDF document text
    • https://tiwilofudux.weebly.com/uploads/1/3/1/6/131606348/7737649.pdfIn PDF document text
    • https://siziloxa.weebly.com/uploads/1/3/4/7/134747516/882950.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b02eeb81-f1b7-45f0-bcf1-65df7f4abe8a/62662549749.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca333734-3b7d-4776-89a2-c62d19a965fa/apush_score_calculator_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cf81dde-4c17-46d4-9ec5-1856cdf2e1c1/lexojimuvuzuzijaru.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/ages_and_stages_questionnaire_9_months.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e51f5d1-8e4c-4ed2-9460-c6074aeef2ff/gta_sa_mod_apk.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_off0000b0f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0F6 4996 bytes
SHA-256: 4466dc806f4edfc5dfe94fe064e1a753c872fc552c7e625df1ee5d796a9f7486
font_01_sfnt_off0000c205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC205 11468 bytes
SHA-256: 9988e36bb56e4985e87bcfe95ffacfe4f803884b12ed8482bde913a5ca3ada32

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