Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd2a837ee30ff3b3…

MALICIOUS

PDF

62.9 KB Created: 2021-01-05 09:19:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f469c582f58f3ff55e6104b3b3e48867 SHA-1: c3bb078065069a40858a423b0964d36779d45c94 SHA-256: fd2a837ee30ff3b3d1ac39f7007dbffdf037f0ee49ab5097b0968025cb1ab409
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO link farms and phishing. The primary malicious URL identified is 'https://traffnew.ru/123?utm_term=a+year+without+a+santa+claus+stream', which is likely used to redirect users to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://traffnew.ru/123?utm_term=a+year+without+a+santa+claus+stream PDF link annotation
    • https://rovewavulitomu.weebly.com/uploads/1/3/0/8/130873995/3de9d9ae73.pdfIn PDF document text
    • https://retumitoratosu.weebly.com/uploads/1/3/4/2/134234586/furilofija.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/pafotudatarepekuk.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/f0bdf40e-c3ea-4d56-84f5-6cef5f3dfecf/95816841074.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b95d4e75-b1a5-4129-bd7e-4a39e25c80b3/kifegurulosanewaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae967fdd-e140-4294-b070-dc2e38a5a974/41383850045.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a369ab83-7048-4435-adb9-02a6dc46765e/musazaludejafotefexanaze.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/zejesadadulakifit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ddb349a-08ac-415f-90b5-6ea69b8fbc8e/16647468080.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8a56d28-68d2-4a60-b398-8888d2280dd6/58908176661.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/739be74e-2638-4079-91bf-cd880cd21187/heckscher_museum_of_art_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af02cf45-7d69-4b67-8659-eaa06e25dc75/duruxepugi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e55e1882-abc5-4acf-b91d-0f99050eb3bd/34141223112.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14328681-da4b-4f4f-bbf3-2ddb66201481/dead_by_daylight_claudette_anniversary_outfit.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_off0000b8cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8CC 5220 bytes
SHA-256: 1309f756cdc8b22c28831c3eeddf4211cf98924a1c129f7b4a39a6eb62c976be
font_01_sfnt_off0000ca7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA7C 11348 bytes
SHA-256: 69b12d0f90497a6cbed5ffe517b02f685ecb7bb6b08b781ffea4a950dbb794a2

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