Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0609b7161df73bb…

MALICIOUS

PDF

76.4 KB Created: 2021-03-14 23:31:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 28f15088a88c9627fce6908f28d5df85 SHA-1: e0708f6f87da6fe13fe037f4ed095d4e6f3f4fdc SHA-256: f0609b7161df73bb7cab0edf354ac34fb4db12bd40f8c29e7eb36e18a4bd1337
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing campaign. ClamAV detection and ML classification further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate a malicious intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/wix?keyword=parts+of+a+sunflower+head PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4374715/normal_5fe5e6267ebd2.pdfIn PDF document text
    • http://rezumitisud.mygamesonline.org/conflict_resolution_in_the_workplace_books.pdfIn PDF document text
    • http://banademebilite.sportsontheweb.net/work_and_power_practice_problems_answers.pdfIn PDF document text
    • http://sozaxesugoj.mywebcommunity.org/49062079747.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445736/normal_60021aa5e863b.pdfIn PDF document text
    • https://tukobigerokigab.weebly.com/uploads/1/3/4/6/134653943/fulak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417998/normal_6004c2d7a7326.pdfIn PDF document text
    • https://pizijejubuga.weebly.com/uploads/1/3/4/8/134883891/459e6f.pdfIn PDF document text
    • http://zeruxejobimal.mywebcommunity.org/what_size_turkey_fits_in_a_18_quart_roaster.pdfIn PDF document text
    • https://mejotozoferu.weebly.com/uploads/1/3/4/8/134866749/14b39e6a9ed7cfd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373248/normal_5fcd5fb962166.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445104/normal_600d247525953.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369774/normal_5ff9c07646751.pdfIn PDF document text
    • https://bisobozewex.weebly.com/uploads/1/3/0/9/130969373/lotitovamad.pdfIn PDF document text
    • http://lobabinuladeri.medianewsonline.com/how_to_cite_an_unpublished_case.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387806/normal_5ff4f5ec034cd.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/3e8c7608-a0af-4890-95fd-7f119c07369c/delekezomemibawana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5aa62a38-1bca-4db3-afdd-58c8b54314b0/momeziwuzuvedogawenab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fbc4207-fc17-4463-9bfb-9e4bec516d49/padojalus.pdfIn PDF document text
    • http://biwosagamivi.myartsonline.com/jutiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5de7d25-7898-4ca5-9195-d8760db7aee6/free_sat_prep_khan_academy.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_off0000ebe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE3 5088 bytes
SHA-256: b434408399cd9cd2dc7c6a6adb5ead5465d7c745145892394ae3674775b5b022
font_01_sfnt_off0000fd3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3B 11016 bytes
SHA-256: 2f26ce84bb987daf7bb4bff15a70907462096cc59aee3d26757cd317447fe1fc

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