Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9ed0b31253af1b4…

MALICIOUS

PDF

39.5 KB Created: 2020-11-07 20:08:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: fe177ae6124428aece6485b8cc6b0b9c SHA-1: 4b2ee1e8ff87b1f87e256088d5110b3f2d71897c SHA-256: b9ed0b31253af1b4419c1ba68c5f9d5e20c0b6e1a271f5545cae7d1618a44fa6
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/123?keyword=one+step+equations+with+integers+worksheet In PDF document text
    • https://wubigunes.weebly.com/uploads/1/3/4/5/134507070/magirowonukij.pdfIn PDF document text
    • https://fojejebub.weebly.com/uploads/1/3/4/2/134265807/livuwusigal-jisipe.pdfIn PDF document text
    • https://sokazavuse.weebly.com/uploads/1/3/1/3/131378988/vofikufox.pdfIn PDF document text
    • https://nopubekekav.weebly.com/uploads/1/3/4/5/134511336/buganejekoxediv.pdfIn PDF document text
    • https://fekanefitogi.weebly.com/uploads/1/3/4/3/134340372/988200.pdfIn PDF document text
    • https://bidukupe.weebly.com/uploads/1/3/4/3/134348295/3b1f5625c50fd.pdfIn PDF document text
    • https://revibafejinaj.weebly.com/uploads/1/3/4/4/134485322/kuvak.pdfIn PDF document text
    • https://gobebirerelimi.weebly.com/uploads/1/3/4/6/134651667/0c5d3ffa68.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/9022b737-d986-4e14-a6c7-6d611c4fde5e/67137223281.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55235344-7cd4-4d84-98da-a377c11a6a24/ffa_2007_indir_gezginler.pdfIn PDF document text
    • https://vuxuwavu.files.wordpress.com/2020/11/92571558564.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/867a5512-ad71-4ff3-8bdc-b6b8b833ccea/kanipepoxuje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fe5ff71-dcff-403f-b059-6ee86fdbc857/pirigunizuxugifafovimago.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/817ce717-7cbd-472c-92f1-e952c4479b15/26567278616.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_off00005ae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE8 5356 bytes
SHA-256: 9d29bfa3bdb20041a53b3b6694ceccb2e78c3e8613d1dddd7b4d84a664b12d0c
font_01_sfnt_off00006d2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D2E 10504 bytes
SHA-256: 5055b849cf84ab33f280298aac5b01e842e730e4bea2de1e08d256ed66e72dbe

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