Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a2da799e30ab43e…

MALICIOUS

PDF

52.4 KB Created: 2020-11-09 05:15:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 7c4aaa7b55b5e2d85fe16a0d7eddcb0d SHA-1: 787b99bab3e6a72919257e5aec408f7199900c4e SHA-256: 4a2da799e30ab43e768ef00172323fd9050c173851f29b2fd101595c41825ee2
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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 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.
  • 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/aws?keyword=ee+subject+specific+guidelines In PDF document text
    • https://bowogemiris.weebly.com/uploads/1/3/4/3/134316512/20c1d46d9d71.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/situdug_sanufojek_gurevemizedan.pdfIn PDF document text
    • https://nulixedupalaz.weebly.com/uploads/1/3/0/7/130739510/5254704.pdfIn PDF document text
    • https://wuxepufoz.weebly.com/uploads/1/3/4/3/134371519/guwoberagujedu_jenobexezofukuf_ziroxunuguxunel_kenusekidiki.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/776913.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/c3c9e4cf-47d8-40ea-9da2-e49d13594e10/64453902082.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b7b5b29-2f65-440a-ab08-56b53ed15cc6/756111241.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfad7dfd-9ec4-4dfd-b5e2-1577af1a8cb7/54642541521.pdfIn PDF document text
    • https://gonugatak.files.wordpress.com/2020/11/81005826731.pdfIn PDF document text
    • https://dadasumuw.files.wordpress.com/2020/11/febeleromosofovemuwam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab34b4b7-b0a7-40e7-b3f6-bac5c20b5c73/33324704811.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a632fc2-1023-4b9e-a5ca-d38bf4d858f5/tapukapoka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/010678b2-1074-4682-bd94-02e396693b92/lagexafixojuxodaropexunos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6d4d2a3-f8fc-4d45-898f-b4add7c40376/85281545946.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fdba1f2-8c9b-4248-845e-2d414d424e9f/jezexomalada.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_off00008e3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E3C 5188 bytes
SHA-256: caee52b2caa97692f65b7ac2638b64916454fdd0b851678427ad683caa09ccc7
font_01_sfnt_off00009ffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FFE 10720 bytes
SHA-256: 257a0303f90752afae1717bd86a76605b2a0f342fab96635a7457d5537998d17

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